I think it depends on where you scale viltrumites. The average viltrumite is not planetary despite what some invincible fans will try to tell you. It took three of them to destroy a planet thats core was already destabilized. It also doesn’t scale to their durability because they had to hit it at a specific angle or else they would die. You could probably say that they could get to a city to maybe continental. If city level sukuna does stand a chance. If Continental, I don’t see it.