You'll really want to see Batman: The Dark Knight in an IMAX theater next summer, judging from this new featurette. Christopher Nolan filmed four sections of it using fancy IMAX cameras that will create a tall, sweeping canvas. Also, there's a rumor that a prequel to The Dark Knight will appear before I Am Legend in IMAX theaters. And it might be in 3D.
The Dark Knight IMAX Featurette; 3-D Prequel Rumors [Slashfilm]