Well, that's not surprising. The Flash has so much potential for a movie, I hope the director they eventually get will be more than just a yes man.
Season one of the tv show managed to nail almost every aspect of the character but the movie won't have nearly enough time to compete so they need to differentiate themselves, especially in the villain department. The Reverse Flash was awesome in the show because of the slow build-up and the revelations regarding Harrison Wells.
A fun way to go about it would be to seemingly kill Barry at the end of Justice League by having him be absorbed by the speed force after defeating a bad guy, similar to what happened in the JL animated series. Then his solo film could be about him travelling the multiverse, Sliders style, trying to find his way back home. You'd get a very different kind of superhero movie.
But who am I kidding, Brett Ratner is probably gonna end up directing this thing anyway.