Hm what exactly is Pariston's deal, just a professional troll? It'd be nice if he'd been featured since the start of the manga so we could get some more back story on him. Maybe he's going to focus on reviving Netero from the dead now.
Ging really is just a terrible father I guess, he has no particular reason to not see Gon, it's great that his character was sort of built up only for him to be an a-hole. But now that Ging's been found, it seems Gon will soon need some new goal in life. Maybe becoming the world champion of rock paper scissors? It's hard to imagine Gon deciding on something specific, it's probably just going to be something like helping his friends when they need it, although that would be a bit too typical shonen, maybe not Togashi's style.
I really want to see an all-out battle between Illumi and Killua, Killua is undoubtedly going to lose, but it's bound to be interesting. It could go several different ways, I'm thinking Illumi will be successful and we'll get an Alluka rescue arc. But perhaps she'll start 'pestering' Illumi in the middle of the battle, forcing him to retreat. I think he's a little too smart for that though, he might try to incapacitate her before anything else.