Turns out Hans Zimmer was only retired from scoring the lousy, Ben Affleck kind of superhero movie
A few years back, uber-prolific German film composer Hans Zimmer suggested that he was getting ready to dial himself back to merely being “pretty prolific German film composer Hans Zimmer”, stating that all these changing franchise actors and whatnot were burning him out on composing for superhero movies. At the time, Zimmer specifically called out the transition from Christian Bale’s Dark Knight Batman to Ben Affleck’s recent turn as the Caped Crusader as a major mind-screw for him, suggesting that it “did [his] brain in” to have to write music for a new version of an old, familiar character. (He also didn’t seem terribly happy to be writing for a Batman who was “grumpy” and “middle-aged.”)