Yes this hilarious divine being has been heavily rumored because of comments made by seth but I made this topic to discuss his appearance. I do think a katamari pressence is neccessary because japan needs to be marketed to and frankly they are great games however should they get a roster spot? I'm not so sure.
My biggest problem is how would that work? I know superbot is REALLY talented at charecter design and made sackboy, fat princess and even nathan drake real fighters though their games made it appear as if they would never enter the fighting genre. BUT we are literaly talking about a charecter who is completely divine and a charecter who does nothing but role up item into a ball.
And the cutscenes are by NO means the focus of the game so how would you do a Narrative strong charecter like the King justice here? It is my own personal opinion that superbot should add a stage that starts as one IP and is then suddenly swept up by the katamari ball. The ball would move slowly and it'd almost be like fighting on a giant tread mill. there would be some platforms that would float ocasionally giving haven to the less platforming inclined charecters but for the most part it would be a junk ridden scrolling stage.