ByUsama Masood, writer at Creators.co
I cover everything from Detective Fiction to Detective Comics (DC)
Usama Masood

It's fair to say that all four of DC's TV shows — Arrow, Flash, Legends of Tomorrow and Supergirl — will be renewed, simply on the basis of their successful "Invasion!" crossover event. The four-part (at least that's what the promotional material suggested) crossover event made that week CW's most watched in over eight years. had its most watched episode since it's Season 1 Episode 10 "The Man in Yellow," also had an increase of 120 percent in its ratings, Legends had their most successful episode to date and had an impressive viewership of 3.5 million.

With that in mind, it's quite probable that will have two crossovers next year, the musical one between Flash and Supergirl, and the one that will occur in the latter half of next year when all four shows begin their new respective seasons. We still don't have an idea of who our heroes will be up against in both the crossovers, but since all four shows are currently on their hiatuses, we have ample time to speculate who are new foes could be and what the next crossovers can bring.

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The 'Flash–Supergirl' Musical

Supergirl & The Flash [Credit: Warner Bros.]
Supergirl & The Flash [Credit: Warner Bros.]

When both the lead actors of your shows (Flash and Supergirl) originally gained fame for their respective roles in 's musical , it's not hard to imagine why the showrunners would agree to such an event. Having said that though, it wasn't the writers who came up with the idea for the musical, but rather the fans, who had been pleading the producers for a musical ever since Benoist was cast.

It also helps that Flash and Supergirl are blessed with supporting actors that have great voices. Jeremy Jordan (Winn on Supergirl) and Jesse L. Martin (Joe West on The Flash) have both performed on Broadway. Keiynan Lonsdale, who plays Kid Flash, is best known as a singer, and released his debut single this year. Legends of Tomorrow star Victor Garber, who was first introduced on the Flash in its freshmen year, recently showcased his vocals on an episode in Legends. Vibe, played by Carlos Valdes, can carry a tune just fine. Moreover, get Caitlin drunk and she has no problem giving us some "Summer Love":

What We Know So Far

Martin Stien "Legends of Tomorrow" [Credit: Warner Bros.]
Martin Stien "Legends of Tomorrow" [Credit: Warner Bros.]

Greg Berlanti, recently (almost) confirmed that Martin Stein will make an appearance in the two-episode crossover, stating to Comicbook.com:

"Oh, I'd be crazy not to. He's got one of the best voices. He actually sang for me at an event once, and if I ever get married, I'd have him sing at the wedding."

What's interesting about this is that Stein is currently aboard the Waverider with the rest of the Legends, and there's a very slim chance that he'd come in just for the crossover. An ongoing storyline in the LOT suggests that his daughter might be in danger, so it's possible that the show might use that as a way to bring him into a Flash episode. Another, more appealing, theory is that we might see an Earth-38 (a.k.a. Supergirl world) version of Stein.

While Barry couldn't quite locate himself on this Earth (as he tried to do so in the previous Supergirl–Flash crossover in January), it is possible that we could see some faces from Arrow that can belt out a tune. John Barrowman, for example, is a good vocalist, so is the deceased Tommy Merlyn (Collin O'Donnell). Though he missed his shot in the "Invasion!" crossover, maybe fans can get to see him in the Supergirl universe. Tell me he doesn't sing like a Broadway antagonist in this video:

Despite a lot of rabid theories — such as Josh Whedon directing this episode — not much is known about the episode. We do have an idea of when it will occur, which is somewhere around the 12th to 14th episode of Flash. Though, how Team Flash will end up in the Supergirl universe remains a mystery. As for the crossover's Big Bad, the likeliest candidate is Music Meister. Originally appearing in an Emmy Nominated episode of Batman: The Brave and the Bold animated series, "Mayhem of the Music Meister!," the singing villain has since then not resurrected, despite becoming somewhat of a popular figure.

In the episode, the villain controls , and using his voice, making them perform all kinds of song and dance routine as he tries to take over the world. The mantle of Music Meister was taken by Neil Patrick Harris, who did a standout job. So much so, that the How I Met Your Mother vet is the fan's first choice for the villain in the live-action version. While it wouldn't be too bad seeing one of our Earth-1 good guys turn evil (especially if it's Tommy), having Neil Patrick Harris could make this musical one to remember.

Batman: The Brave & The Bold (Credit: Warner Bros)
Batman: The Brave & The Bold (Credit: Warner Bros)

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The 2017 Four-Part Crossover: Could The Crime Sydicate Arrive?

The Crime Syndicate (from DC Comic's Forever Evil) (Credit: DC Comics)
The Crime Syndicate (from DC Comic's Forever Evil) (Credit: DC Comics)

It might be too early to start guessing what the new year will bring (but hey, that's what we nerds are for, right?), but we can certainly hope that it will be as awesome as the Crime Syndicate. Back when Black Siren first appeared on the Flash, many fans begin to hope that we would see the makings of the Syndicate form.

For those of you who don't know, the Crime Syndicate (also known as the Crime Syndicate of America or the Crime Society of America) are basically the evil counterparts of the Justice League of America. Originating from Earth-3, these villains have been victorious in taking over their Earth (after they defeat the good hero Lex Luthor) and their reign of terror forces Lex to seek help elsewhere. This is how the real JLA meet hero Lex from Earth-3 and help him defeat the Syndicate.

A few years ago, saying that the Syndicate will appear in the Arrowverse would be absurd. But since then, we've not only had major characters such as , Martian Manhunter and Hawkman grace our screens, but also had some very mainstream comic book villains such as Reverse Flash, Grodd, Deadshot and appear on the show, meaning the limits of where the CW DC universe can stretch have been blurred.

A lot of this has been due to the failure of DC's Extended Universe (i.e their movie universe, ). Since DC has pretty much cornered the market on cable network TV shows, it's been clear that DC execs are now more willing to work with Berlanti and his team. What this means is that in the next few years we might see more mainstream comic book characters appear on CW. Logically speaking: If we already have Superman, why can't we have Lex Luthor?

Since DC TV has introduced a lot of characters, this could work wonders in an crossover episode, particularly in bringing the Supergirl characters into play. For example: Superman's evil alter-ego (Ultraman) had an henchman called "Mister Action" (a super-powered version of Jimmy Olsen). In issue No.1 of the Annual Superman/Batman comic, Mister Mxyzptlk (who is already confirmed to appear on Supergirl later this year) narrated a story in which Superman and Batman (and their friends) meet their Earth-3 doppelgängers while on a cruise. A similar setup could also be implied, particularly with Supergirl and the Flash.

 Justice League: Crisis on Two Earths (Credit: DC Comics)
Justice League: Crisis on Two Earths (Credit: DC Comics)

This opens up exciting opportunities for the Arrowverse, and also means that something like the Syndicate can definitely appear on the show. Seeing evil versions of (known as Deadeye on Earth-3) or (Johnny Quick) will surely be fun to watch, and as the comics and in the 2010 animated film Justice League: Crisis on Two Earths clearly showed, when the heroes go, bad things always take a fun turn.

So far there's not been any indication that the Syndicate could appear on the show, but it was pretty suspicious that the Arrow writers decided to make Supergirl's Earth No. 38 rather than Earth-3 (where the residents of the Syndicate live). Considering everyone from Vixen (her Earth-3 version is Vamp) to the upcoming Flash character Gypsy (the Crime Syndicate's version is called FortuneTeller) has an Syndicate counterpart, it's only a matter of time before the Arrowverse gets truly crazy.

Are YOU excited about the upcoming crossovers? Could the Syndicate arrive in the Arrowverse? Should Caitlin get drunk again? Sound off below!

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Should Crime Syndicate appear in an Arrowverse Crossover?

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