Arrow is going big this season with The League of Assassins and Ra's Al Ghul. Besides being a batman villain Ra's has fought Green Arrow in the comics a few times. But the big thing about The League is that their international organization. Therefore hopefully more locations in the DC Universe will be introduced and established. I think Warner Bros separated the Movie and TV universe to allow the T.V. one to do what ever they want without contradicting major events between the two.
With the characters introduced so far and coming up it looks like their building towards Justice League International.
Reasons Why ?
1. The A.R.G.U.S. Connection
I believe with Amanda Waller will manipulate and justify the members to take down dangerous criminals that the Suicide Squad can't handle.She is going to find and recruit members to work with the Arrow in the beginning at least. Eventually they'll going against her and working only with each other and to be funded by Palmer Technologies & QueenCorp. She already knows about the Arrow and the league of Assassins and H.I.V.E. It will not be long until she knows about The Flash and the other meta-humans in Central & Keystone City.
I believe by Year 5 in the TV Universe their will be a form of the Justice League. There will be a threat that the Flash and The Arrow can;t handle on their own.
2. The Characters
So far the T.V. has only 1 core [Justice League](movie:401267) character. Every one else has been part of either the Justice League of America or The Justice League International. Introduced so far and upcoming characters are
The Arrow & The Flash
Ray Palmer (The Atom)
Cisco Ramon (Vibe)
Ted Grant (Wildcat)
Ronnie Raymond (Firestorm)
Locations introduced or mentioned
Central & Keystone
Coast City, Home to Green Lantern, Hal Jordan.
Kahndaq, Home to Black Adam.
With the upcoming characters and exploring these locations DC is growing thier faster than Marvel in the movies.
#3 Justice League International means they DON'T HAVE TO INCLUDE Superman, Batman and Wonder Woman.
There's a reason why they can't use Batman and Superman and Wonder Woman.Because they are trying to established the big 3 in Batman Vs Superman. Having another version so SOON , will confuse the average moviegoer about the separation between TV and Movie, as they are both building to their version Justice League. And Geoff Johns stated the TV Universe wants to do it differently then the movies.
(It's about the continuity.) In the TV Universe, they can say that Batman almost never leaves Gotham or he just started his crime fighting war. Wonder Woman can be isolated on the Island Themiscrya fighting Ares and Circe.( Amazon TV Series hopefully 2-3 yrs from now).
And Superman is still traveling the world to learn about himself. And with Green Lantern, which ever character they chose could be off Earth. As Aquaman is still underwater in his Kingdom, Atlantis. (Best to introduce in AMAZON, if they make it.)
And that is the reason Justice League International ( JLI ).Is what they are going for because.The Justice League International doesn't have the big 3. Yes Batman helped create it, but that won't be so in the TV show. It can be Arrow and Amanda Waller. They meet other heroes like Vixen and Animal Man from Africa, Fire & Ice, the Brazilians and Plastic Man on the run in Europe or Canada before he turned good.This what they can do if they chose, but I think this what is realistic enough. Hired by the government (Amanda Waller) to hunt down dangerous criminals and meeting other heroes along they way, creating a superhero community while fighting evil organizations around the world. (H.I.V.E and more soon to come).
CW confirmed that they are working on a 3rd DC TV cinematic show.Hopefully it's Wonder Woman (Amazon).Which they had in development before The Flash but it fell apart .But if Batman v Superman is a hit and people like Gal Gadot's WW, then CW might try again to make Amazon.The reason I say Wonder Woman is because she can connect to other heroes & villains such as Shazam. Since both come from Greek mythology background.And even though Aquaman and the Atlantis mythology is not Greek, they can change it to Greek, but keep elements from the original. Plus all the action events can take place outside the normal world on Themiscrya and Atlantis, other mystical locations.
To summarize the DC TV Universe is probably Leading to Justice League International because the characters their bringing, the locations their showing and it will be realistic by finding heroes & villains across the world not just three cities in the U.S. While the government is both helping and controlling them from being heroes.To fight all evil and to do what is right, can be the focus of the show. Arrow, The Flash and Amazon ends after Year 5 or 6. Then to make The Justice League International.
(Side note -Not every single person should be on the JLI. Arsenal & Black Canary protects Starling City while The Arrow is away. And Kid Flash & Vibe protects Central and Keystone City. JLI roster can be The Arrow, The Flash, Firestorm, The Atom, and Wildcat. Later Vixen, Fire and Ice maybe Booster Gold and Guy Garner.)