Conventional wisdom seems to be to not have the same character star in both TV and film, because the audience might not pay to see them in the theater if they can see them at home for free. Yeah, Superman Returns came out during Smallville's run, but that was technically just Clark Kent in the show. Gotham can exist because it's Gordon-centered and you have Bruce Wayne instead of Batman. If that Green Lantern / Flash film rumor is true, I suspect it's not only because GL needs to be rehabilated, but also because WB doesn't have faith in Flash's ability to headline his own movie when another version already has his own show.
All of which is to say that if Superman/Batman/Wonder Woman do show up on TV, it'll likely be as characters in the Flash series rather than their own properties. Unless movie Wonder Woman fails and they go back to the drawing board.
I'm also in favor of the TV shows being separate from the movies, but I'd go further and say that I'd rather Flash never have been attached to Arrow.