Fix the preloader, for one thing
I saw promise in the animation, but the parts you animated were very roughly drawn. Also, I couldn't understand what Iron Man said at the end, except the word "served" - and that was only because it appeared on the screen as well. And what was with him showing off with the one armed push-up at the end? Apparently it made the bad guys sad that he could do one armed push-ups, I guess the point was to make it look like they were conceding defeat at his one-armed push-up mastery, but they just looked sad.
Team up with someone else to do the artwork, work on the sound, fix the preloader, and work a bit on that final scene to make it less like a gymnastics demonstration and more like a fight, and you'd have something here.
I can see that you put a lot of effort into this, but it needs more work.