Well, after the depressingly poor SDCC showing it's nice to see some interesting news. Affleck is a great Bruce Wayne/Batman, they can't go wrong giving him more screen time. Whether this means Cavill will be back too, and there will be more Affleck/Cavill/Gadot remains to be seen.
Whatever, as I said before, MoS/BvS/ZSJL is good enough for me. Thrown in Aquaman and the first Wonder Woman movie, and I can say I am in a good place as far as DC heroes and the Snyderverse go. I can move on, but if there's some more quality stuff with that cast coming, I'm happy as well.
I think it is possible for everyone to have their cake and eat it too. WBD
can do this! Easily, in fact.
Main continuity can remain Snyderverse in it's sweeping, grand, operatic, mythic style, with Snyder delivering all of his amazing visuals. Darkseid obtains the antilife equation, mind-controls Superman, conquers and decimates earth, etc. It'll give us all the Knightmare vision stuff that's been teased thus far in visions and dreams. Bruce assembles what's left of a resistance among the superheroes, metahumans, and supervillains. They succeed with a heist to steal from Darkseid the mother box that Cyborg and his father had kept. Barry sends Bruce back to the Batcave to save Lois and kill Darkside (in so doing sacrificing his own life) to restore the timeline.
Then in JL 3 the forces of Apokolips return to make a final all-out assault on earth to attempt to get the antilife equation back. Presumably led by Desaad but also including Granny Goodness, Kailbak, the Furies, Mantis, and other Apokoliptian villains. This results in something like "Avengers assemble" for earth as an entire planet. Led by a fully realized Superman, Amazons, Atlanteans, superheroes, super villains, all join forces to repel the invaders in a loving extravaganza and celebration of fantastical superhero genre tropes. Hopefully at least Orion and a few other gods from New Genesis travels to earth to help out as well.
But anyway, comic book-y as all get out. And gloriously so. This is basically the payoff, the full reconstruction, after the ”grimdark” deconstruction of MoS and BvS.
For the final chapter, JL 3, they will bring Black Adam, Shazam and the Shazam family, Supergirl, Batgirl, Blue Beetle, JL Dark superheroes, etc., from their pocket universes to the main continuity. I think Del Toro's JL Dark will also be a pocket universe of this multiverse, and we'll see them appear in JL 3 as well. That will be the ace up their sleeve in that all out war. It's going to be a lot like Flashpoint Paradox and Final Crisis, but very much it's own take by Snyder and the others among that brain trust for the new management such as DeLuca, Alan Horn, and whoever is hired by Zaslav to be the DC "czar."
Reeves' Batman trilogy and the Joker sequel will remain independent of all this however. Those will remain "black label" outside of what I'm describing. Those two directors have already contractually established that they want creative freedom to tell their own tales independent of what is going on in the DCEU.
Anyway, until that final act in JL 3, we'll see Aquaman 3, WW 3, Cavill's MoS 2, Batfleck's solo film (from earlier in his career, told in flashback is my guess), a DC trinity film, and JL 2. And in the alternate pocket universes, i.e., the Black Adam/Shazam-verse, the Batgirl/Supergirl/Blue Beetle-verse, and the JL Dark-verse we'll see development of those superheroes and villains, and their stories.
No one can really legitimately complain about this because everyone gets what they want and it all culminates in a grand finale that ties it all together. It's everyone having their cake and eating it too.