Here's my predictin, HIGH FIVING MFer :P
In terms of directing Flash, Superman or Wonder Woman, I really think that WB is looking at any new or fresh directors that came out from the Toronto Film Fest, or have been making waves for the past couple of years. Or WB favorites like Soderbergh.
Very Strong:
-Matt Reeves (Let Me In, Cloverfield): He hasn't announced what he's officially doing next and he WAS in the running for Wolverine 2. Don't be shocked if WB snags him. (Good fit for any DC project)
-Duncan Jones (Moon) Enough said! (Good fit for any DC project)
-Ruban Fleisher (Zombieland) He can do action and comedy perfectly. Also, he's free after his next movie. Hmmm? (The Flash)
-Greg Mottola (Adventureland, Superbad) I think he's a perfect fit for The Flash. (The Flash)
Good Chance
-Mark Romanek (Never Let Me Go) He may or may not have a bad rep after his departure with Wolfman, despite his success with his latest film, 'Never Let Me Go'. (Superman, Wonder Woman)
Far Fetch but possible:
-Edgar Wright: The problem with him is that he's stuck with Ant-Man, but that movie is in limbo because it WAS suppose to be a tie-in film to The Avengers at one point but now it's stuck in development hell. It's possible that he can do another UK comedy, or jump ship. (The Flash, maybe Superman)
-Steven Soderbergh But he's busy next year his virus movie. Maybe Flash or someone else. (Superman)
-Neil Bloomkamp: He has repeatedly say that he's not interested in big franchises after the Halo meltdown. He's working on his own film now, but never say never in Hollywood. (Superman, or another DC project)