I don’t even think it’s about catharsis. People just want a new Batman movie, because we haven’t had a proper one in 10 years, and after what a mess the DCEU has been, having a Batman with a clean slate feels refreshing.
And yes, AQP II does put a hole in this argument that only fun escapist movies can do well in the pandemic. In the case of NWH though, that movie is doing as well as it is because it’s the epitome of fanservice. Sure, it’s a lot darker than the previous Tom Holland movies, but it still goes out of its way to have big crowd cheering moments, just like Endgame.