Marvel Avengers: Battle for Planet Earth — As revealed by Uatu, in order to save planet Earth, the Avengers must battle the shapeshifting extraterrestrial race known as the Skrulls. The Skrulls begin replacing Earth's heroes with doppelgängers who not only look like the heroes they portray, but also have their powers. The remaining Marvel heroes must battle copycat Skrulls to prevent an alien race from invading through an interdimensional portal above New York City.