If Aquaman, WW and SS can continue after "Snyder-verse" has ended, and if WB can introduce Shazam and Black Adam, there's no reason why Batman couldn't be successful going forward.
Which is why making a separate Batverse with Matt Reeves unnecessary. solo Batman movies set before the events of MoS could work just fine.
So, now Bat characters are distributed over two different franchises.
Will Amanda Waller, Harley Quinn, Black Mask, Zasz, Huntress, Renee Montoya, Cassandra Cain, Captain Boomerang never interact with Batman ?
( to say nothing about Deadshot, Deathstroke, Killer Croc, Katanna, Joker as all of them are in DCEU.)
I would rather have Batman appear in DCEU. WB are short sighted and are just looking at another Nolan like Bat-trilogy from Matt Reeves, nothing beyond that.