New Bonds
An alternative way to describe Thor in one sentence is as follows: Thor is Goku with Vegeta's arrogance and anger issues, as well as lightning. Because of this, I would pay money to see Vegeta meet Thor. I also think that interactions between Chi-Chi and Thor would be interesting. Beyond that, I think everyone would probably like Thor, if not initially, then eventually. Bulma may or may not drool over Thor in the beginning. Lastly, Thor would like Gohan, especially if he makes Loki happy.
I think Loki could have a soft spot for Goku since he's so similar to Thor, but she would never admit it. Loki would have a field day with Chi-Chi, Videl, and Bulma. In contrast, they may not like her too much. Loki and Pan would have a rocky relationship, at least initially, but Loki would be an opponent that Pan is not accustomed to.
Bulma and Tony Stark meeting and interacting would be fun to watch because they are also similar characters. Specifically, Bulma is basically Tony without being pushed to her full potential and realizing that she could try to be better.
I think Gohan would be friends with Stevie and Bruce. Gohan and Stevie are both mature, young adults that have been through a lot in their lives that try to be kind to everyone, so I believe that they would be good friends, and it would be good for him to have more friends his own age. Chi-Chi would like Stevie. Also, I read a fic once (Piccolo died in the Cell games and Goku lived) where the author said that he sees Gohan as the Hulk of the Dragonball verse, and it makes a lot of sense. So I think that Bruce Banner and Gohan would be good friends, as well.