Sooo, I just read that the Flash solo movie (due in 2022) will be the Flashpoint storyline which will mess with the timeline / multiverse... I'd been wondering how they'd replace ol' Batfleck with R-Batz for any future Justice League stuff, but I'm guessing that will explain it, Flash is going to balls up the multiverse and somehow merge a younger alternate Batman into the same DCU as Wonder Woman and Aquaman?
They'll probably use it to ditch Leto as well