I am fully aware that whoever wields mjolnir receives the power of Thor and that is the set up to the new ongoing. I only meant that the female Thor's actual identity is unknown at this point. Jason Aaron has hinted that it is someone we already know, so I guessed at Valkyrie or maybe someone more unexpected like Carol Danvers or Jane Foster.
I'd also like to point out again that Thor is not a title given by the hammer, in the same manner that putting on Iron Man's armour doesn't make you Tony Stark. When Beta Ray Bill or Captain America wielded it they didn't literally become Thor, they just co-opted his powers. But this isn't the way this is being sold to people by Marvel.
"This is not She-Thor. This is not Lady Thor. This is not Thorita. This is THOR," writer Jason Aaron said. "This is the THOR of the Marvel Universe. But it's unlike any Thor we've ever seen before."
We know this isn't true though from Marvel's own release schedule. Thor himself will still be about albeit in a depowered form, so Marvel is just telling lies to bump up the interest.
Similarly I feel taking the Falcon and putting him in a frankly awful looking Captain America costume diminishes him as his own character. It kind of makes it seem like he was a side-kick all along; the Robin to Cap's Batman constantly being trained as a replacement. However I always saw them as equal partners. I like the Falcon but I like him as he is and as I said, there is little chance that his tenure as Cap will last longer than a year, if that.
Also, there is/was a black Captain America of sorts in Isaiah Bradley. His grandson Elijah was essentially a teenaged version of Cap and much more suited for a promotion to full time Captain America. But Elijah is criminally underused by Marvel and would grab fewer headlines, even though it would be a much more obvious and organic way to have an african-american Captain America.
And I'm not even going into the dodgy subtext behind forcefully depowering white male characters to elevate women and minorities. It's lazy at best and can be downright offensive at worst.
I am not saying any of these changes prevent good stories being told or that these are inherently going to be bad comics. Female Thor might be the biggest break out in years.
It's just that when you get down to it there isn't really much going on here. Instead of Marvel saying "Falcon is Avengers team leader and Valkyrie takes Thor's place as god of thunder" they are selling it as "THOR IS A WOMAN AND CAPTAIN AMERICA IS BLACK! EXCELSIOR!".
Marvel is selling a routine roster update as something more progressive and trailblazing than it is. If they spent half the time actually writing decent comics that they spend on coming up with gimmicky ways to market them, maybe they wouldn't have to resort to such cheap tricks.
Sorry to get all ranty, but it bugs me that in an age of massively heightened interest and acceptance of superhero characters, Marvel and DC's editors seem to have regressed back to using 90's sensationalism and faux diversification to push up sales. It's lazy, it's patronizing and, while well intentioned, only serves to highlight the troublesome nature of tokenism.