In retrospect, Jane Foster should have been the most obvious candidate (pre-existing character, name recognition from the movies) but still a well told story, and the fact that it didn't seem certain at the time shows Aaron's skill. Now we can only hope that the secret Nick Fury told Thor to turn him into Odinson will pay off as well as this, though I have my doubts that'll happen.

I'm getting shades of Betty Ross turning into Red She-Hulk here, and while I'm not generally someone who likes it when superhero casts all get upgraded until it's so insular that there are no regular people, it's not like anything else was being done with Jane Foster.