They had discussed it before. Of course they had. They battled and defeated one Norse god. They had another routinely walking around the Tower. It was natural for them to speculate if the other Pantheons existed. And once they knew they did, that's all it took. (It was all Clint's fault.)

Challenge: Tony Stark was a genius, billionaire, playboy, philanthropist, and an Avengers. Ashton Carter was a student to Charles Xavier-he was a mutant. Twenty years ago, Tony walked out, and he never looked back. Sometimes, you don't have to turn around, when fate just throws something three inches infront of your face...just peachy. Warning- There's X-men in here...

Challenge: "…Friend Anthony- you cannot possibly," Thor started before frowning as if deep in thought. "Okay, I can take a lot of crap. But there is no way, you are a god." Anthony Edward Tyrggr Stark. Part time Asgardian? Just a little on his mother's side.