2. The Flash - Ryan Gosling
Judging by the description in the rumoured roster, Ryan Gosling would make a perfect Flash. He's good looking, confident and loved by woman the world over - exactly what DC will want from their Barry Allen. I could even see Gosling being the DC equivalent of Robert Downey Jr.'s Iron Man. Batman and Superman are not comedic characters so it makes sense to have some subtle comic relief thrown in somewhere. I never really pictured Gosling as having 'superhero' potential but his performance in Drive changed my perception of him. I also think his role in 'Crazy, Stupid, Love' showed his arrogant, yet emotional side - yet another example of how he could create a perfect Barry Allen. He's been heavily rumoured with the role for the best part of a year now and I can't see any reason why he shouldn't get it. He's even hinted at playing "The Flash" in an interview so hopefully DC just have to call.
Notable Mentions: Bradley Cooper, James Franco, Dale DeHaan