Just signed up for the Avengers crossover big bang.
Mine might be one of the only ones that won't feature either Coulson or Loki, and will only have Tony in a limited role, primarily because well, none of those guys really interest me all that much.
Now Cap, Thor and possibly Clint and Natasha vs the Winchester boys, that I find much more interesting. Considering the Winchesters ideas on gods... and Cap's belief in God in regards to meeting Cas, I can only imagine them meeting to be far more interesting. And well Dean vs Black Widow, I can only imagine how much he'd love to have her kick his ass*eg*