I think it's either gonna be Sanji vs Katakuri or Sanji/Jinbei vs Katakuri though that may be too easy as Sanji seems to be a great counter to his ob haki and Jinbei is a great counter to his DF so if they did team up they should be able to take out Katakuri easily.
I see it as two options.
With the picture frame gone and the guns I dont think it will kill big mom what I do think it will do is cripple her down to about sick whitebeards level.
so we have this group of people who can all fight
-Vinsmokes
-Strawhats
-Bege pirates
And we have all the guests + all the commanders + Big mom
Thats a lot of moving bodies but they all might be required to take out big mom
The total left overs might be all captians vs big mom.
Judge + luffy + Bege + Jimbe + Nami + brook(for weather control + countering devil fruits)
Then sanji will handle the left overs with all the vinsmokes vito +co plus the remaining strawhats
Plus we still have that loaded bomb so even if the strawhats lose they can still defeat big mom.
Who do you think will fight Katakuri or Big Mom?
Time limit for signature if I lose?
1 month