From what I've read Cavill hasn't been fired but WB kind of don't know what to do with Superman in general. Fans like him and he wants to do it, I think it's just WB not having a clue. It'll be interesting to see the fans reaction if the Snyder cut of JL gets released (and it looks like it might happen after all) as it's apparently a very different film compared to the one Whedon cobbled together. WW was very enjoyable, Aquaman was good but not great and I'd like to see a Flash/Cyborg movie even if they do one together. The DCEU isn't dead, but WB are at a loss as to what to do with it.