It's a tough question for them. If your business is primarily selling male power fantasies to disempowered readers, it is gonna be hard to suddenly switch that around and keep the same people buying the comics.
At heart, that is what genre fiction sells - fantasy. From crime dramas on television to horror movies to romance novels, people go to them to get relief from pressures in real life. Rich white men may control the world, but they don't reflect the reality of life for most men, young or old, so James Bond, Tony Stark and Indiana Jones are release valves for that frustration.
But suddenly changing the race and gender of those characters while telling essentially the same sort of story isn't going to appeal to new readers on that approach alone. I mean, readers come in looking for male power fantasies and, sorry, we're not making those any more. Well, yes, you are, but the heroes just aren't male. That sort of "diversity intitiative" is basically appealing to no one.
This is where I go back to the way Teen Titans and X-Men were able to connect the mostly white male readers to characters who weren't all male or all white. Essentially, they made the teams our surrogate fictional friends and family. So when Storm fought Cyclops to lead the X-men, it was a big deal, but not because she was a black African woman, but because we knew her. We were connected to the character and not her characteristics.
Isn't that how Whedon made BUFFY such a big hit?