sorry but i think a guy who talks to fish is harder to translate than the flash lol
thats not his only power
and its hard for me to describe my feelings towards why Flash would be the most difficult
Just a bunch of jumble thoughts
Superman has super strength, flight, freeze breath, etc.
Batman has his martial arts skills, his detective skills, and his gadgets
WW has her strength, her braclets, her overall warrior abilities
GL has his ring that is only limited by his imagination
Aquaman has super strength, ability to talk to fish, and his ability to breath underwater
and what Im getting at by saying all that is that the rest of DCs main heroes have multiple powers while The Flash has 1 his speed.
Granted through his 1 power he gets a variety of abilities but Superspeed is a power I just think could end up looking really really corny in live action. I mean sure so can talking to fish but at least Aquaman has other powers to draw from. If superspeed ends up not looking good then the movie is f***ed.
But I really look forward to a Flash movie because while I think it would be the hardest to make it is the one (after Batman) that I am anticipating the most.