I doubt Hitsugaya is dead. I really don't think Tite Kubo will be killing off any main (or popular)characters anytime soon. Though, I will give him a praise of respect if he does. I've been waiting for a main character to die. I know that sounds kinda negative or whatever, but for once I'd like to see some tear-jerking-omg-I-really-liked-that-character-he's-really-gone! moments