Not sure if it's actually a popular theory but i remember Mr. Morj making a SH vs BB matchup prediction videos where he said that all the straw hats in Jaya would be matched with all the BB pirates in Jaya, with the exception of Robin since she wasn't quite part of the crew yet and Zoro since Shiryu got his own special introduction later.
So in his mind it would be:
Luffy vs Teach
Nami vs Laffite
Usopp vs Augur
Chopper vs Doc Q
And Sanji vs Burgess as that's the only one left.
Considering he already had to make 2 exceptions and that Burgess probably makes more sense for either Jinbe or Franky, i don't really buy the theory.