Quite frankly, WB and DC should probably just stop. They can do nothing without people b*tching and complaining and moaning so they should just say "Fine. Then we won't make any of these movies."
"Why do they only make Batman and Superman movies?"
- "Okay we'll make movies with other heroes."
"Why are they ignoring Superman!?"
"If they're gonna hire directors for their particular vision then they need to let that director share their vision and not interfere."
- "Okay, we'll allow the directors to share their vision."
"We hate this vision!"
They can do nothing. Why bother?