This makes 0 sense the whole Big mom is going to fight Kaido thing is just stupid. If anything it will be Kaido himself vs all the supernovas. Except for Drake since he obviously with Kaido.
It makes perfect sense since there is a common thing they both want, Ceasar Clown.
CC has been dragged through 2 arcs and now his story will get a pay off. Because Big Mom wants him for his Giantification formula and Kaidou wants him for his smile fruits because he wants to make a zoan army. So he could serve as a catalyst to fuel the fight between the two of them, since both need him for their 'collections'.
So it at least has 1 more argument than your wet fart theory which has none. Also why are you ignoring Big Mom, why will Kaidou be a fight and where will Big Mom be in all of this ? You haven't thought this through at all but that doesn't surprise me at all.
Also the supernova's are in different factions, it's still a question where Kidd's, Hawkin's, Apoo's, Killer's, Urouge's and Bege's loyalties lie. Urouge has attacked Big Mom before and Bege is working for her but is mysterious. And the Kidd alliance might be forced to fight for Kaidou (crew hostage situation) since we only saw Kidd locked up, but what about the other 2 ?
So the theory that doesn't make sense is yours at this point in time, because there is way too much you simply don't know yet.
If you want to go ahead and say that 'if anything' this will happen, I wish you good luck hoping that this ungrouded madam shirley act will somehow strike gold. But I doubt it very much.