"Dark Knight" is most definitely for adults, given the remarkably gruesome nature of the story line. That said, the combination of scenes filmed in IMAX with those derived from 35mm via IMAX DMR works very well. The transitions between the two sources are clear. The IMAX sequences, as with all true IMAX sources, are spectacular. The plot is a bit derivative. Anyone ever see Dick Tracy? Same plot. In fact, though Heath Ledger does a great job as The Joker, I couldn't help thinking of Al Pacino as "Big Boy" Caprice from Dick Tracy. I would find it odd if someone told me that Ledger didn't model his character on Pacino's. In any case, if you have the option it is definitely best to see the IMAX presentation.