Apologies, but it seems that there is some confusion in your question. The information provided in your synopsis does not match the movie "Ultimate Avengers". It appears to describe a different movie entirely.
"Ultimate Avengers" is an animated film based on the Marvel Comics superhero team, the Avengers. It follows the story of a group of superheroes, including Captain America, Iron Man, Thor, Hulk, Black Widow, and others, as they come together to defend the Earth against a threat from the extraterrestrial Chitauri.
If you could provide more accurate details or specify a different movie, I would be happy to assist you further.