You know how there was a marvel video game called Spider Man: Shattered Dimensions? It was about Mysterio accidentally opening a rift between four dimensions, so Madame Web had to get four different versions of spider man to help her. Spider Man of Earth-616, Spider Man 2099, Spider Man Noir and Ultimate Spider Man. All of them were voiced by different Spider Man actors from across the decades, and it was all a really cool concept. I saw a playthrough of the game years ago. It made me like Spider Man Noir, even though his whole world felt kinda dark and creepy. Cannibal Vulture is something that always comes back to me. As does the 2099 female Doctor Octopus. Lot of interesting things in that game.
Anyways…my point is that I think DC could do a Batman game in this style. Instead of Madame Web, we can use Madame Xanadu or The Phantom Stranger. Instead of Mysterio, we could use Scarecrow or Mad Hatter or Joker or something. And instead of the four spider man variants, we'd have four different batman variants from across the multiverse, mostly all tributes to different batman shows and games. We'd have the modern comic book version of Batman. We'd have the silver age style Batman. We'd have Batman from a world based on the Telltale Games. And we'd have one final Batman based on the 2004 tv series. Four Batmen, all unique in their own way.
In terms of voice acting, I already have four ideas. Rino Romano as the 2004 Batman, of course. Troy Baker as the Telltale Batman. Diedrich Bader as the Silver Age Batman, since he's the only one capable of doing Silver Age Batman (now that we've lost Adam West). And… I don't know, maybe Roger Craig Smith as the comic book version of Batman? He seems like he could pull that one off. Also, there'd be a bonus fifth Batman. In a silly post credits sequence, i'd want to show Lego Batman. I don't care who's playing him. It can be Will Arnett, it can be someone else. But Lego Batman needs to make a cameo appearance at the end, just as a fun little gag. Maybe show Lego Joker, too (played by either Zach Galifianakis or Christopher Corey Smith). But yeah. There's our four (or five) batman variants.