The actual Nika zoan form
Its not a form like the genie. It's Nika's actual beast form. It seems like Nika is actually a destroyer normally and the most famoua user made him a hero and liberator.
Genie was a gimmick that lasted like 3 pages and had zero story importance.
Everybody is reacting to Monkeyffy in shock and the last chapter cliffhanger is it negging Zaza with a clear implication the fruit took over.
For me the thing about it is
I think that implication is projecting the community reaction onto the story
It could be the fruit taking over, or it could be another sort of transformation in line with the genie, and Luffy playing along with it, maybe a deeper toonforce of Gear 5 where he takes on different animals' characteristics
But it's not clear that it is and I don't think it's what's going on, because in my opinion the Nika destroyer thing comes from the fact that he would destroy the WG, not that he's an actual rampaging entity, and if Luffy did just get a new stronger form he would be Roger level now, only place to go, and really, is Luffy gonna become PK level by being taken over by his fruit?
It wouldn't do anything against Imu either way even if that did happen, which if it did it'd suck