Ever since the movie came out this forum has turned into a cesspool of negativity, which as a BvS defender really bums me out. But outside the Positivity Thread, you just provided the first glimmer of hope I've seen in a while.
In a way, maybe the critical drubbing and relative box office disappointment of BvS will make Warner Bros. try harder from here on out to make good movies. At a certain point they seemed to spend more effort selling the movie than actually making sure the movie would be both great in itself and appealing to a mass audience.
The box office for BvS is just enough to show that there's potential, but not so much that Warner Bros. thinks they can just shove these characters into any old movie and audiences will turn out in droves. I know studio execs are notoriously thickheaded and slow on the uptake, but maybe it will get through to them that the reason the MCU is a success is not just because they took a bunch of different superheroes and put them together, but that they made audiences love these characters and want to see them interact with each other again and again.
Of course, given their track record, my guess is that WB execs will react to this in a superficial, panicky way by aping Marvel and trying to shoehorn more humour and quips into their DC films from SS on out.