We went to a little boys party recently that asked all the kids to come as their favorite superhero. You could do that and still have the official theme be Iron Man. At that party, they had rented a bouncy house. As for games, you could do a game of 'guess which superhero/villain" based on pictures or clues. I don't recall who Iron Man's enemy is, but you could make a paper airplane game with the villain face (they get certain points if their airplane "missle" hits various parts of the villain's face); you could make up a treasure hunt--or perhaps call it tracking down the evil villain--where the boys have to figure out where in the house/yard the next clue is hidden (the clues could be written from various characters in the story). I was in Barnes & Noble and they had those little paper books with an Iron Man story, or Batman, or Spiderman ($3.99 each, same look & feel as the Bearstein Bear, Barbie, etc. paper books. Oh, it's called Iron Man Fights Back, ISBN-13: 978031608364, List Price: $3.99, Online Price:$3.59).. Not sure how much you wanted to spend but if you got enough of those books, they could be reward at the end of the treasure hunt (and also be the party favor).