[discussion] Who thinks Natsu should fight against the ultimate combination of all slayer type magic making them way worse then Acnologia?

I kind of thought it would of been very cool if Natsu fought someone without the other dragon slayers help that was pretty much Acnologia like but with all slayer types like dragon god and demon it could make a great opponent for Natsu and the person could be way beyond Acnologia level of power. what do u think?