Omni-man said the whole reason for having Mark was so when he was of age and obtained his Viltrumite powers, they could get Earth ready to be assimilated into the Viltrum empire.
But ever since the Flaxans invaded Earth, I have to wonder if he even needed Mark in the first place. Nothing Earth or Cecil has could have stopped Omni-Man from enslaving humanity. The much more technologically advanced Flaxans were single-handedly wiped out by him as well. Even all of the Guardians of the Globe together could stop him.
Did you think he might have delayed the inevitable on purpose? I personally think he didn’t need to blend in, learn their ways, find their weakness. It’s apparent that he could take anything they threw at him.
What do you think? Did his love for Earth eclipse his loyalty to Viltrum?