I'm upset that no one here is discussing the important parts of this chapter.
How did his hand blow up and who is he controlling at the moment, that's supposed to crouch?
My guess for the explosion is that Chrollo affixed moon to Hisoka's hand at some point. And then had the copies marked with sun. So when he touched the head is exploded on contact.
For the person he is controlling, is it a nen user? There should be a whole lot of people watching that can use nen and are skilled at it. Why would just "normal" people be watching two from the elite, fight it out at heaven's arena?
And no, there's no chance at all that this fight will be interupted. Hisoka will win regardless and if he doesn't he will be back later even though we think he's dead. Chrollo and Spider are so irrelevant for the story and they had a whole arc. They can easily be killed off now.