Two words: Red Lady.
I really hope they're not just using him... But I think, with including him, if he really really truly is dead they'll lose a lot of fans for the TV series because it caused such outrage when it happened.
If he get's resurrected by the white walkers then we all know who's gonna be winning that war!
I legit cried when he died... But then I also cried my heart out when Hedwig died so ya' know!