Do people seriously believe this arc can be viewed as an intended conclusion to the Kurapika vs Phantom Troupe blood feud?
I mean, it doesn't get much more clear that it isn't than this:
And what would be the point of introducing the possibility of Chrollo having his Nen restriction erased if they didn't plan to do more with the Spiders? Obviously they still have a role to play in the story. It'd be such a waste to introduce, develop and establish such a compelling villainous organization only to write them off after a single story arc (where they only lost two members, three if you count Hisoka leaving).