Fujitora, GB or less likely (1%) Garp
With Fujitora just 1v1 hype. I'd assume Fujitora prepped for this and will have a capable back up to take on Crocodile too
With GB, the above + prisoners like Weevil, King, Queen could also join CG. Maybe more hype if that sword is really a black blade. Perhaps GB didn't make it himself but his master, an ex admiral Mihawk killed?
With Garp, biggest 1v1 hype but also other big fights. CG and the Marine Hunter capturing the hero of the Marines?! 3 way fight between BBP, CG and SWORD/Marines