Apparently, WB is considering (until they'll change their mind again) to begin a new DCEU with Reeves/Pattison's Batman. If this end up being the route they'll follow, Cavill Supes will be treated as a parallel-Earth Superman, while the new "rebooted" Superman will be the main Earth one.
The Supergirl movie (hypothetically set in the new DCEU) is expected to start production in early 2020 and the casting will eventually start in a few months. I read that, in the current script, Superman will meet Kara at the end of the movie. If the scene will not be removed, we'll prob heard soon who'll play the new iteration of the character (just my speculation).
Mark Hughes' tweets about the transition from the old to the new DCEU:
"Nobody should be surprised that The Batman will not be tied to the previous DCEU film version of Batman, it's not a prequel to Affleck's Batman and some of us have been telling y'all that for literally the past year.
The films still in existing DCEU continuity are their own separate thing.
The plan seems to be to make several new films like The Batman, Supergirl, Batgirl, etc that will eventually cross over w/each other, but first they want to see which ones are good and successful enough to merge together, basically.
So this Batman will have a Gotham corner of DC films, while Supergirl helps build a new Kryptonian corner of DC films, etc etc, and later they'll take the best ones and merge them for crossovers. That's SEPARATE from the DCEU movies that are continuing, like WW84 & Aquaman 2 etc.
The new Batman movie is not tied at all to the DCEU. The prior DCEU only exists in the form of WW84, Aquaman, The Trench, SS2, & BoP. Separately, unconnected to any past DCEU films, they are making a bunch of new DC films in their own separate new universe.
Gal/Jason/Margot are part of PREVIOUS DCEU. Their films will play out for a few more yrs, then those versions of characters will end. SEPARATELY a NEW DIFFERENT DCU is going to be created w/Batman, Supergirl etc. Then AFTER Gal/Jason/Margot are gone their characters get rebooted.
WW, Aquaman, SS, BoP, etc are films set in current DCEU (but they don't plan to cross them over anymore). That's how the current DCEU will "continue" for a few more years. SEPARATELY, they are rebooting Batman, Supergirl, & some others to eventually form a NEW DIFFERENT DCEU.
But this is all just "potential" at this point, since whatever plans are in place are still evolving and could wind up changing since they're still figuring it out, & there's the whole AT&T merger thing that could eventually lead to changes in plans too."
https://twitter.com/markhughesfilms/...69791526539266