"The year is 2125 and the Magellan Science Academy has given two lucky cadets "Thulium tickets" to join a team of space explorers on a special time-travel mission twenty-four hours into the future. But when their mission goes wrong, the two kids must band together with a tiny flying saucer sidekick to save themselves, their crew, and all of Space Mountain--before time runs out and the galaxy is destroyed!"--P. [4] of cover.

Collects twenty stories chronicling the adventures of such heroes as Iron Man, Captain America, Black Widow, and Hulk as they fight against supervillains, including Ultron, Thanos, and the Masters of Evil.