Then again, Thor entering the Disney princess circuit would also give people a reason to never, ever retire the whole "Disney princesses as [insert other thing here]." Hmm.
Disney owns Marvel. Marvel owns Thor. Thor is now a woman, who is the daughter of king Odin. Thor is now a Disney Princess.— Brian (@DaftBrian) July 18, 2014
Alas, right now the Disney Princess line-up doesn't even include Anna and Elsa, apparently/currently, so I wouldn't get too hyped on this Thor technicality.
EDIT: the tweet originally in this post was not correctly sourced. We replaced it with the person who originally made the Tweet.