Pretty much. Let’s be honest: They weren’t going to make a DCAMU movie where Batman or a Bat-character wasn’t involved even if it was just a minor way like Death and Return of Superman was. Least Man of Tomorrow restricted Bats to a single photo
But I really do think a Flash movie without Batman would do well. I thought the GL movies were flops because they never did more, but their sales are actually strong? I just don’t understand the thought process at DC right now.