If he won’t complete his mission then why wouldn’t Omni Man just betray the empire and remain on earth? Is he not just playing Devil’s Advocate at this point by just trying to appease them by other means? I don’t understand what good that is, if he loves his son and can’t kill him then simply remain on earth and live amongst the humans.
He didn’t realize he didn’t have it in him to kill Mark until he was a punch or two away from killing him