Yet another Dark Knight trailer

Mmmmm... IMAX. Since the last Batman movie, to new IMAX theaters have opened up in town, greatly increasing the odds (and convenience) of seeing this Batman on the IMAX as well.

Everything I've seen so far points to Ledger being an awesome Joker, which really makes this a bit bittersweet. I really wonder if they kill off the Joker like they did in the first movie, if they originally planned to but changed their mind because of Ledger's death, or if they originally planned to have the Joker live but decided to off him since no one else would be able to do Ledger's Joker justice?