Matt Reeves' The Batman will feature multiple villains.

Oh, I don’t mind multiple villains, especially when it’s well-done, the way Nolan did it. I just don’t think Loeb’s usual all-villains’-cameo tactic will work for the movies.

Rumor is that Penguin is calling the shots.

I’m not exactly sure, reading the article over again, what “a full rogues’ gallery” means. It seems to mean everybody, or at least all the famous ones (and maybe a few not-so-famous ones), but then we get this: “As for which specific villains will make up this rogues gallery, Reeves was predictably tight-lipped,” which seems to imply that there will be a few villains that Reeves will choose—à la every Batman movie except for ’89.

For me, it would just strain my disbelief too much to see Bats fighting everyone over the course of a single story. While Jeph Loeb was able to make it seem organic in TLH and (to a lesser degree) DV, I don’t think even he was able to pull it off in Hush, where many of the villains’ appearances felt like padding. (One notable exception: while I can’t stand the Harley Quinn character and would have replaced her with the Joker, her opera heist both furthers the story and would be interesting to see on-screen.)

On the other hand, the BTAS episode summers8 put above is an excellent example of doing this kind of thing right (a more serious version, perhaps, of the Adam West Batman movie—amazing how, for all that show’s camp and goofiness, its premises and plots were both good and influential).