Screenwriter David S. Goyer assures us that, despite Warner Bros.’s will, it was never really a question of including the Batman trilogy in a vast DC universe.
Writer heavily involved in the DC movie adaptation for Warner Bros. David S. Goyer notably worked on Man of Steel, Batman v Superman: Dawn of Justice, and of course on the trilogy Dark knight of Christopher Nolan. Asked about the construction of the franchise by the Hollywood Reporter, he was clear: there was never any discussion, between him and Nolan or with anyone else, to cross The dark knight with the Superman of Man of steel… although DC would have liked to establish a link between the two:
“There was no discussion of this when I was working on Man of Steel, nor even a discussion with Christopher Nolan Moreover. Chris always wanted to keep movies from Dark knight as a separate entity“, claims David S. Goyer first before explaining:”The studio continued to want, naturally, to integrate their trilogy into an extended universe, a vast DC Universe. Chris was also a producer on Man of Steel, and it’s tempting to think that the two films were related … but they really weren’t. Afterwards, I’m sure retroactively you can still say there was a connection, but in real life it wasn’t. “
The DC Universe was then created, without much success, around Zack Snyder’s Superman, with Ben Affleck as Batman, until Justice League Snyder Cut released this year on HBO Max.