Last episode we saw Kregg tell Mark that it’s now his job to weaken Earth for the upcoming full scale invasion and he has 100 years to prepare for it, but really what does he have to do ?
Nolan already took out the old Guardians Of The Globe who were far more capable than the new team, and as we saw with alternate Mark he and his dad took out the new team extremely easily.
Isn’t Earth pretty much already easy pickings ? If Lucan, Vidor and Thula went to Earth instead of hunting down Nolan they could have taken the planet with no issues at all. Even if Mark did decide to turn on earth the only thing he’d really have to do is kill the New Guardians and maybe take out some of earths WMD’s and that’s it really, from the Viltrumites POV it’s like telling someone I’m going to move into this fully furnished house but before I do I’m going to give you 100 years to cut the grass on the front lawn before I do it.