And you know this how? His actions alone from DMC3 shows he would still want his fathers power more then ever since Dante formed the Sparda sword and he was defeated by Mundus. Revenge is what he will most likely seek. Not to mention he wants to walk in his fathers shoes. Vergil will change but that thirst for power wont.He doesn't even like humans or the human world.I'm guessing this but i believe on DMC3 Vergil planned on obtaining his fathers power and ditch the human world to rule the Demon world. Not that he was evil in 3 but he most likely felt he was wasting his life and time in the human world when he could be destroying the demon world.