If WB bases its big decisions on differentiating themselves from Marvel they're gonna stumble big and often, considering that a lot of what Marvel does is just... common sense.
Seems to be they're constantly chasing after the success the TDK tone brought them back in 2008, when not only is it a very different scenario that they're working in today, but to paint their entire universe with the Batman brush is a lousy idea that could only come from a confused studio terrified of taking chances. For some reason there's this idea that WB's more "serious, grounded, high stakes" tone is gonna make for a religious experience of a movie that's gonna make Marvel's films seem small potatoes by comparison. Beats me why, based on evidence.