I want to like this movie, but from what I've seen of the leaked plot (if true) that's probably not going to be the case. The most recent leak looks very credible indeed. I won't spoil specific plot points in case the leaked plot is true. But I don't think it is really spoiling anything... all this has already been widely reported... to say that it seems designed to set up a universe with Keaton as mentor to Batgirl, Supergirl, Flash, Aquaman, and Wonder Woman as the basic JL.
Now to this I would say that as long as there can be other parallel universes/timelines, that's fine. It's potentially interesting. But I would not want this new universe at the expense of--or as a replacement for--what Snyder was working to complete. I want to see the latter much, much more. I want to see ZSJL 2 and 3. And reportedly David Zaslav loves the DC trinity (rumored also that Zaslav would love to see a DC trinity solo film). And I don't think what he has in mind is Batgirl, Supergirl, and Wonder Woman.
But anyway, it sounds like WBD (David Zaslav) wants to scrap the approach of having separate parallel universes which is what Sanroff, Emmerich, and Hamada were going for, and instead to create a unified, single, shared universe same as the MCU. With the HBO Max DC TV shows (and CW DC shows all sunsetted) integrated with the films, plus games, and comics, etc., and all of that all existing within one vertical structure with a Kevin Feige-like "czar" running it. And reportedly not a creative, but a businessperson who can manage that. So maybe someone like Scott Stuber of Netflix. (Or even J.J. Abrams, God help us.)
That's why I think all the films are being delayed with reshoots.