The first half of “Invincible” Season 2 leaves Mark in a pretty bad spot. As the episode “It’s Been a While” comes to a close, Mark is bloody and beaten, laying on Thraxan ground as he watches his father get carted away by Viltrumites. His only stroke of luck is that he’s still alive, but much like Robert Downey Jr.’s Iron Man at the end of “Avengers: Infinity War,” Mark is trapped a long way from home with no clear path back.
Unlike Iron Man, Mark’s abilities aren’t limited by the need for some kind of power supply. Omni-Man flew to Thraxa from Earth, and there’s no reason Mark can’t try to do the same thing. He almost left the planet, but his father warned him that finding his way back to Earth would be a serious challenge and the travel time would be significantly increased without a Thraxan ship.
All that means Mark has two different ways he might be able to get back to Earth. If there are any Thraxan ships still intact, they could take him back home, but Mark would probably also need to find a surviving Thraxan to pilot the ship. Otherwise, Mark will be stuck flying back home on his own, which could potentially take him months or even years if he gets lost along the way. Whatever path he takes back, he’s likely going to have his little brother as a plus-one for the journey.