The reason he is being brought back would be my idea that "The Monster of Monsters" Typhon is starting to stir.
Name: Kristoffski Von Blake
Age: 18
Gender: Male
Parent: Hades
Claiming: Yes
Powers: Drains energy from his enemies when he touches a wound, this may be used to kill. He can raise skeletons from the dead but the energy needed comes from him. He feels it when humans die. He has the ability to summon a Hellhound, however, this is a serious drain of energy.
Personality: His mother was living with him in a flat when he was six, and they were attacked by storm spirits bonded to Zeus' will. His mother was killed, but he escaped on his hellhound, which was then the size of a Saint Bernard. His mother never knew about the Greek gods, and therefore assumed that the Hellhound was indeed the family dog. Kristoffski came to camp the next year on the winter solcitice, He was then claimed the next day. On his claiming, Chiron exiled him, and he has plotted the death of several of the camp counsellors, including Annabeth Chase and Percy Jackson. However, he is quite happy to work with anybody, until the time is right...
If we all die in 2012, I'm blaming YOU!what the hell is going on here? What did they say and what just happened?

Hm, child of Zeus? Well, that will conflict with camp rules. A lot, but they don't know that your of Zeus yet, so I guess thats...accepted. Feel free to post.