I still expect the Blackbeard fights to actually incorporate the roles they have.
So if we’re talking Lafitte, he’s a navigator. He‘s a hypnotist. He has wings. All that is pointing, to me, of him being a Siren. Siren’s being famous for luring sailors to their deaths with their voices.
So I’m seeing Nami vs Lafitte not just being a physical fight, but Lafitte having trapped a collection of ships at sea and luring them to their defeat, and Nami having to use her navigational ability to rescue them, then defeat him. Also fits since Oda, tbh, really doesn’t care for drawing traditional fights anymore.
For Sanji, he’ll be going up against Pizarro, who is exemplifying all the worst traits of Judge and Germa. Maybe leading an army of slaves, who he’s starving with the promise that they can eat once they attack a town or something like that. Throw in him attacking a woman and throwing himself a gluttonous feast where he wastes food, and that’s everything Sanji hates in one.
Doc Q can be releasing viruses that Chopper needs to overcome (maybe Viruses that give Doc Q and Stronger a physical boost)
Auger being a teleporting sniper that Usopp unlocks FS to defeat
Shiryu indiscriminately slaughtering people
Franky’s definitely turning the Sunny into a Mecha to fight Wolf the Colossal Battleship
Can have Jinbei trying to helm Noah, full of Fishmen, to escape the destruction of FI while Burgess is trying to destroy it with Blackbeard’s flagship, or even Pluton
Devon using her DF to try and hunt down a woman important to the true history like Vivi or Shirahoshi, while Robin tries to stop her
Brook and Shot having some strange music battle like a sing off or something
Oda can do a lot of really interesting things with role based fights. He can even combine some as well (ship battles featuring the Navigators, Shipwrights and Helmsmen).