I read people here already expect Jinbe for this arc, I think the otherway.
With this Luffy already make a good point, Big mom arriving first and still be there yet Jinbe didn't arrive has a good reason. We have far no a little point/info about the accident with Germa66 and Fishmens vs Big mom and that is a point with Oda clear want later to show up. I think their will be a point where Luffy and the others face Big mom and getting the news about Jinbe and the Germa66. Don't think that even one of the alliance could escape from Big mom.
Another point with I don't understand, why Nami,Chopper and co aren't take care about the big event with Big mom. Did they think that Bm get killed or something? That will be a major point in the fire festival, if they don't have any plan for Big mom alliance, they gonna get rekt hard by Kaido and Bigmom in fire festival for sure.
And I even believe more that Jinbe don't will come after this panel. The news about his "death" will make Luffy his mind and lose total the controll, I call this right now!!