I think the DCEU is done as we know it. Affleck isn't coming back. Fisher isn't welcome back. Cavill isn't going to have much to come back to even if they can get him back. There certainly won't be another JL movie. I think the Pattinson Batman is them signaling they are moving on. Gadot might get one more movie. Ditto Momoa but I don't see anything else taking place in that particular universe going forward. It certainly won't be the MCU in the way they hoped. Miller's Flash might even be moved to another universe. Though that's just over speculation on my part. The SS movies can take place wherever they want. Keaton is no spring chicken. So I can't imagine he's got a decade's worth of Batman movies in him. Even if they did use him to replace Affleck.