Why in theory when you'll get to see it with your own eyes in canon soon
No what I mean is how does it fit
Whats there to left for him to help the story and themes?
He is not gonna become PK
He is out of the race
He will not go to Laugh Tale
He is not even there to be knocked over like mihawk who has also 0 relevance
Best he can be is a cameo or one of the guys in elbaf or in the final war. But that implies he is gonna be a Luffy cheeleader which IMO is worse for his established character
If he gonna come back and spew the same shit like always it would be unironically Buggy level of clown but without the entertainment