Talk about manipulative! If this is true, it's either totally genius or completely evil. Or maybe both. Cinematical writes today that six or seven minutes of The Dark Knight [1] will screen before IMAX presentations [2] of the Will Smith sci-fi thriller I Am Legend [3]. Erik Davis states in his post:

This won't be an extended trailer of sorts; from what we know, this will be an entire scene — they're calling it a prologue about the Joker. That's all we have to go on now, but if you planned on seeing I Am Legend when it hits theaters on December 14, you might as well skip over to the local IMAX and check it out there. No word on whether a new Dark Knight trailer will come attached to Legend in conventional theaters, but I've heard there may indeed be something.

Even if I weren't already planning on seeing I Am Legend this December, this gimmick would have totally roped me into it. Sneaky sneaks! Anyway, you have until December 14 to map out the closest IMAX theater to you.

Source [4]