I don't think any DC movie is going to make altering the universe/timeline part of its plot. I imagine Aquaman and onward will be a 'soft reboot' -- continuing some characters/stories, while refreshing others without calling attention to it (like a Batman recast).WW1984 will be DCEU's Days of Future Past, erasing the shitty future. Or Diana could've been transported to and is trapped in a parallel dimension in which DCEU's movies will now occur, thus eliminating the need to explain recasts and such; actually, this would be awesome because then Matt Reeves could place his Batman movie within the universe and we could all forget that damaged Jared Leto stench.