re: The main villain for season three of Arrow

Very cool. The Arrow producer's comments seem to indicate that Arrow could use Ras because he would not feature into the "Batfleck" universe. I think one could infer that DC will at least keep their film and TV universes separate - i.e. characters who appear in the Justice League film universe won't also appear on any of the TV series, played by different characters (Fox's Gotham series would be the exception, since it's events would presumably take place before any of the Justice League film storylines).