User blog comment:0000EmmaO/Who do you think will most definitely appear in the Dark Continent arc?/@comment-5780397-20141216180055

Illumi has messed around with Killua quite a lot, but we haven't seen him fight, so I guess that is one of the reasons. Plus, one of the Kakin royals could have thought of hiring one of the Zodiacs to kill his siblings, and as a Hunter and the only one able to move freely, with every corner of the ship monitorized, as it appears it will be, Illumi seems the most suited. Wow, that would be sweet.

As for Hanzo... he was quite interesting when he appeared and popular despite his rare appearances. Plus, I guess everyone would like to see his Nen abilities (basing on his personality and on Yu Yu Hakusho, I'd say he is an Emitter, but anyway).

Though I don't see how, there might be the Troupe, and I hope Zzigg Zoldyck too. Even more unlikely, I'd say Melody, because I am really curious to see her appearance before the Sonada.