I think I am starting to agree with that. It has become such a mess that a hard reset is needed. I really want to see Henry cavill as Superman and gal gadot as Wonder Woman again but I think it would be hard to build momentum again if they just continued. Too much baggage. Honestly, I would be good with continuing to use the actors from the Snyderverse with whatever they are wanting to do but I suspect that would be confusing to the general audience. I do wish they would use Pattinson batman as the new DECU batman and have “The Batman” as the starting point of the new canon. I think having just 1 Batman going forward would be nice.
From what's been said, that was one plan Gunn had, but Matt Reeves gave that a hard "no" b/c he wants his Batman not part of any larger universe. So currently, the word is that both The Batman 2 and Joker 2 will be the final versions of those independent "universes" with a clean slate afterwards for one cohesive universe going forward. Of course, money talks, so who really knows what's going to happen.
Things are changing daily or even hourly at this point so we don't really know what's actually going to happen.
First we had WW3 cancelled, then WW3 with Gal but no Patty Jenkins. Then, we had Gunn's tweet about liking Cavill and wanting to make Superman a priority, but now Cavill is officially not coming back. Pretty sure it's only a matter of time before the rest of Snyderverse actors get canned. It's said he also met with Affleck but for directing a DCU movie rather than acting in one.
Apparently, Gunn's current take on the next Superman movie will be very much based on the Superman: Earth One book/Superman: Man of Tomorrow animated movie with a younger Superman in his early Daily Planet days, which would make sense if Jason Mamoa is now being cast as Lobo given that Lobo is the initial antagonist in the Man of Tomorrow animated movie that kind of exposes Superman to the world.
Given that it's been said Gunn wants all media (movies, TV, animation and games) to be one universe, it wouldn't surprise me if he maybe tries to adapt the new Animated Universe movies (post-Apokolips War) that have already been released into live action movies and then from there, everything else follows the live-action. That includes Superman: Man of Tomorrow, Justice Society: WW2, Batman: The Long Halloween, and Green Lantern: Beware My Power.