Depends on the villains the tv shows want to use. Pretty much any which might appear in the movies are off limits and have been killed off or otherwise rendered unusable in the tv shows (Deadshot, Deathstroke, Captain Boomerang, etc). Quite a few villains have crossed over to other comic book titles, plus the same villains have fought the same heroes in the Justice League titles due to the villains being involved in various organizations like the Injustice League, etc.
Plus, with the Flashpoint story arc coming up, everyone is pretty much crossing over. And, Snart is the hero/mayor in the Flashpoint story. Though it will be interesting to see how they work the Aquaman/Wonder Woman plot out of the story.