I think there's a good chance kurapika and the troop are gone before we reach the DC, the story still follows gon and killua.
my headcannon is there gonna be a timeskip and gon and killua will reach DC somehow with alluka, there gon will get his nen back and all the stuff with don freeces
I see it differently, and I see it interweaving.
By the time the Moby Dick reaches the fake Dark Continent, where the Hunter Association is set to bring them new resources, most of the normies on the ship would've died and the Succession War would've concluded. As the survivors (Beyond's faction, the Hunter Association's faction, and Kakin's new king + entourage) set sail for the actual Dark Continent, we cut to Gon and Killua. I expect an arc the two of them against Gyro. There are interesting fan theories that in the Spider's absence, Gyro takes over Meteor City. Then, once this arc is over, we cut back to the actual Dark Continent, with Ging becoming the main POV. And somewhere mid-arc, I expect Gon and Killua to find a way to reach the continent themselves.
No he won't Hisoka will kill Chrollo this time.
In Heaven's Arena, Chrollo had all the necessary preparation to defeat Hisoka, which he did, but he didn't account for post-mortem nen. The three treasures he's stealing from the Kakin family will make sure that Hisoka stays down once and for all.
The tragedy comes from the fact that Chrollo is doing everything in his power so that the Spider will survive him, but by the end of it, he will be the only Spider left standing. The Dark Continent will be where he recruits new members.