Unless this just isn't Jinbe's fight, which there are some cases to argue for.
Oda generally deals with villains via powerscale. WsW being dealt with first either means he's weak as shit (doubt) or this is only a preliminary portion of Jinbe's main fight. Think about the rooftop battle. It happened and people were concerned that this was the final fight happening before anyone else. Here we are 20 chapters later.
Nah this is Jinbes fight (seems like most of the chapter is focused on the fight), its more so that Oda is wrapping up all the fights that were established early on for the Strawhats.
Nami vs Ulti- Done
Usopp vs Page One- Done
Jinbe vs Whos Who- mostly likely done
Next chapters we will probably finish up Franky & Robins & Brooks fight so that the main stage fights (Luffy, Yamato, Sanji, Zoros) can get settup and be the main focus.