"What happened to Arthas's body? What happened to Illidan's body? What about Kael'thas?
It is likely we will bring Illidan back, not so much for Kael'thas, he already had his come back. Arthas's body is somewhere but we don't really know where."
Yep, they are finally bringing Illy back. Show your feelings on survey
And for the topic - in what manner do you think Illidan will be coming back? Once again as a villian, this time even worse (pledged fealty to Old Gods for more power, for example) to continue Blizzards new tradition of showing his bad sides? Or maybe as a leader/major character in a faction, that is going to fight Queen Azshara, where he will reunite with his brother and understand his mistakes in First War? What about another revamp of BT raid this time? Or maybe something like this - Illidan makes appearance in WoW exp no. 6 as a main teacher of new chero class - demon hunters?
Those are my ideas, and the last one is the most plausible for me. What about yours?