What a long title that brings up a lot of questions. Why not just Iron Man and X-O Manowar? What's this game about? What does the X-O stand for? Who the heck is X-O Manowar anyway?
Go search YouTube videos of this game, and all you'll find is gameplay of Iron Man because nobody even really knew who Manowar was. It suffers from that same problem Fantastic Four and The Incredible Hulk: The Pantheon Saga suffered from-- with being in that awkward teenager year of going from 16-bit to polygons. But it does get one, and I mean ONE, praise: it's not nearly as terribly animated as those two games.
This game feels like it tried to be more than it was, but lost something in development. There were some cool features, like enemies being in the background and being able to attack them without it being a true 3D game. But the repetitive spamming of repulsors and complete lack of story makes this title truly throwaway. Which is a shame for everyone's favorite X-O Manowar... Okay but seriously, who is he? Why is he in this? He's not even a Marvel character!