I personally would have just liked a movie where he faces his Rogues. The TV show never did the Rogues as a group and so its uncharted territory.
I agree, a Flash vs. Rogues movie would be cool. I get the impression that the just-begun final season of the show has a Rogues-centric arc, given that it opened by introducing a new Captain Boomerang. But I wish they'd done the Rogues as the collective main threat for season 2 or 3 instead of doing three speedster nemeses in a row.