smells like misogyny to me!
Because everything that doesn't bow down to radical feminism nazi shit and kisses its feet is automatically misogyny?
There are male characters in mythology, and there are female characters in mythology. If you want a female character, a strong warrior type with power, who commands respect and is listened to by the other gods - the norse mythology has several you can take.
Making an inherently male character female is at best stupid, and at worst both misgoynic and misandric. If you have to look that last word up in a dictionary, you've just revealed your true nature.
If I were a feminist, I'd probably hate this. What would be a good thing is to create an original female character, one that's not a sidekick or off-shot, but a fully-fledged character in her own rights, with none of the stupid revealing-armour-that-is-worthless-in-a-fight-but-makes-your-boobs-look-bigger nonsense.
The only people who I can see to support an idiot move like this are feminazis, the people who're not really interested in equality of any kind, but believe in women being the master race. They are the only people who can possibly have a problem with a beloved male comic book character not being a woman.
Everyone who simply would like to see more female characters on screen, in books or elsewhere would understand that this new "Thor" is not actually a woman. He's a male character in a female body, that's all.