Originally Posted by Kevin Smith
So that is why I prefer Barry Allen pretty much for one thing. He is the original as far as The Flash as we know him is concerned ("iconic" version), and he is the best, IMO.
Anyway, any dynamic you get with Wally Flash in the JL/JLU show, you can just as easily also get with Barry Allen as The Flash. The dynamic is pretty interchangeable as the JL/JLU Flash didn't mirror his comic counterpart much.
In the first two arcs of the NU52 comics, Barry and Hal's dialogue provided the comic relief. I'm guessing that is how the JL movie will play out, too.