WARNING: THIS CONTAINS MAJOR SPOILERS FOR THE FLASH
So here we are at the beginning of the summer without our TV superheroes. And as we await the return of The Flash, this break allows us time to reflect on what happened during the last season. But it also gives us the opportunity to look forward and think about what could possibly come next in Season 3. Throughout its first 2 seasons, The Flash has given us an amazing live-action adaptation of one of our favorite comic book heroes (Thank You Grant Gustin!). But it has also given us awesome live-action adaptations of many of The Flash's famous villains, including Reverse-Flash, Zoom, Grodd and the Rogues: Captain Cold, Heat Wave, Weather Wizard and Pied Piper. The first two Rogues went to Legends of Tomorrow, Weather Wizard has since been apprehended again and when Barry altered the timeline, Hartley Rathaway (Pied Piper) became a sidekick of S.T.A.R Labs. Thus, it looks like The Flash may be running low on villains. Let's take a look at some of the bad guys we want to see in Season 3 that The Flash has yet to explore!
1. Mirror Master
Mirror Master is arguably the most famous nemesis of the Flash who has yet to make an appearance on the show. I still wonder why they haven't explored Mirror Master yet. The character uses mirrors that create effects including holograms, hypnotism and invisibility. In fact, some iterations of the character could actually use mirrors as portals, moving in and out of the "Mirrorverse" (sound familiar?). In the comics, there are two versions of Mirror Master: Sam Scudder and Evan McCulloch. The former is perhaps the more famous one but the latter was involved in the Flashpoint timeline (you thinking what I'm thinking?). With the show's phenomenal writing team, I'm sure they could give either version of Mirror Master a great story. In fact, with recent rumors that Season 3's "Big Bad" might not be a metahuman, I couldn't think of anyone better for the part than Mirror Master. The vast majority of our scarlet speedster adaptations feature this character and it would be pretty cool if The Flash did too.
Also part of the "Rogues" faction, the Top is another of the Flash's renowned arch-rivals that has yet to appear in the TV series. Roscoe Dillon, a crook obsessed with spinning tops, eventually trains himself to spin so fast he can deflect bullets. So he literally becomes like a...top. It may sound unusual, but the results are incredibly effective. Despite being a prominent Flash villain, Top hasn't appeared in much outside of the comics. He may not have ever been portrayed in a live-action adaptation but he has appeared in animated series Justice League Unlimited and Batman: The Brave & The Bold as well the animated movie Justice League: The Flashpoint Paradox. Now would be a great time to give us a memorable live-action adaptation of Top on The Flash. The series would be more than capable of fitting Top into their world.
3. Cobalt Blue
The theory of Cobalt Blue existing in the Arrow-verse is an interesting one. First off, the character's name is Malcolm Thawne and he is the twin brother of Barry Allen who was given to the Thawnes by the Doctor after he accidentally killed their child during delivery. He also happens to be an ancestor of Eobard Thawne. As a grown man, Thawne learns of this and, with his Grandmother's help, he learns of the Thawne family's history with the "Blue Flame" and how could be wielded to steal whatever the heart truly desires. He crafts a blue gem which can contain the flame, and thus, Cobalt Blue was born. Out of jealousy for his twin brother Barry Allen, Blue also used the "Blue Flame" to siphon the Flash's superspeed. Cobalt Blue may not have appeared on The Flash yet, but there has been a interesting fan-theory going around. The original character Eddie Thawne (also an ancestor of Eobard Thawne) was killed in the Season 1 finale before being sucked into the singularity. But he had a medallion-type of necklace around his neck, which had fans wondering if that could have been the show's version of the gem which stored the "Blue Flame". Now that Barry has reset the timeline, Eddie will be alive. Thus, could we see Eddie become the TV version of Cobalt Blue? Let's not forget that Eddie too got jealous of Barry due to his close friendship with Iris. He would certainly fit the bill and it would be a treat seeing Rick Cosnett back on The Flash.
4. Captain Boomerang
So while Captain Boomerang has never actually appeared on The Flash, he has squared off with Grant Gustin's incarnation of the scarlet speedster. Nick E. Tarabay portrayed Digger Harkness on the Arrow offering of the first annual The Flash/Arrow crossover event. The Flash and the Arrow (and their respective teams) teamed up to protect Lyla Michaels and take down Boomerang. The episode featured quite a few impressive showdowns with Harkness, including the Flash saving the Arrow by grabbing two flying boomerangs in mid-air. Despite conflict over their different approaches, Barry and Oliver were able to stop Harkness and save Starling City at the same time. While the Flash and Team Flarrow disarmed bombs, the Arrow defeated Boomerang in battle. Oliver would later tell us that Boomerang was imprisoned on Lian Yu, next to Slade Wilson. I don't know about you, but it would certainly be exhilarating to see Captain Boomerang return and take on the Flash one more time.
5. Black Siren
Seeing Katie Cassidy kick ass on The Flash as Black Siren was one of the highlights of "Invincible". The acclaim she received for her performance was not only incredible but justified. She was badass, empowering and, to be honest, a little frightening. She may have played Black Canary brilliantly on Arrow but it was great to see her finally getting the respect she deserves on The Flash. I know Black Siren technically may not be a Flash villain but now that we know she is trapped in the pipeline, it's highly likely that she will return during Season 3 whenever (if) the timeline is restored. Without a doubt, Black Siren was one of the most formidable metahumans of the second season. We need to see more of Black Siren in Season 3!
6. Black Flash
You loved this moment didn't you? In the Season 2 finale of The Flash, Barry created a time remnant which drew out the Time Wraiths; however they went for Zoom instead. A few seconds in their possession and Zoom's face began to decay. However, that's not all that happened. His emblem and lightning turned red and comic book fans freaked out because Zoom had become Black Flash. As they carried him off we were left wondering, will wee see Black Flash return? In the comic books, Black Flash is a manifestation of death, almost like a warning or omen to those who are connected to the Speed Force - basically a DC version of the Grim Reaper. Thus, it seems very possible that we might see Zoom return as Black Flash to claim the souls of any speedster who is near death. Could a Barry vs Zoom rematch be on the cards? Highly possible!
HONORABLE MENTION: Reverse-Flash
With the recent announcement that Tom Cavanagh will indeed be returning as a series regular for Season 3 of The Flash, it's quite possible that we could see Eobard Thawne's return as the fake Harrison Wells. However, as Barry defeated the Reverse-Flash and saved his mother Nora Allen, altering the timeline, Thawne might not get to kill Wells and steal his body. Thus, we might see Matt Lestcher return as the actual Eobard Thawne. Either way, we might just see the Reverse-Flash again in Season 3 and that is always a good thing for the viewers, as fans of the series loved the 'Man in the Yellow Suit' arc. The Reverse-Flash is, without a doubt, the Flash's number 1 villain and that fact alone makes us want to see more of him.
The Flash has a very interesting selection of villains. As many as the series have already covered, there are still a lot left to explore. With the ending of the Season 2, we're most certainly going to get an epic third season. But which new villains will we encounter? We'll have to wait and see...