If Ezra Miller is absent – and Warner Bros. doesn’t want to further confuse the current continuity – then it might be time to introduce a third iteration of The Flash after Jay Garrick and Barry Allen: Wally West. For fans who are unfamiliar with the character, he was originally Barry’s partner, Kid Flash, and he got his powers in a Barry-like accident where he was doused with various chemicals that allow him to use the Speed Force.
Wally is Barry’s nephew and became DC’s top speedster after “Crisis on Infinite Earths” when his uncle sacrifices himself to destroy the Anti-Monitor’s anti-matter cannon. Yes, it’s a mouthful, but it’s a comic! One way or another, Wally remained the main version of the Flash for several decades, until Barry returned to battle in “Last Crisis”
It looks like Miller’s version of the character has finally settled into his superhero career – which is probably why he’s only now trying to save his mother in a solo movie. But like Warner Bros. push Barry aside so he doesn’t work with Miller anymore? The simplest explanation would be that the hero’s multiverse machinations are tearing at the fabric of reality, and he will have to sacrifice himself to fix it.
This will obviously be taken from Crisis on Infinite Earths, but it will look completely unique to Barry’s story, and it won’t take long for the final shot of the movie or the post-credits scene to introduce Wally as Scarlet Speedster’s successor. This would allow Warner Bros. moving forward with The Flash as a franchise without all the drama surrounding Miller and the issues that would go hand in hand with keeping them on board.