Human and Viltrumite genes are incredibly similar, which is why Mark can go head-to-head with a Viltrum native, in theory.

Invincible is getting ready for a brand new story in Season 4 not seen in the original comics, and this could be the perfect ...

Conquest confronts Mark and discusses with him his progress ... more about fighting than the assimilation of planets for the Viltrum Empire’s expansion. He then begins his fight with Invincible.