I saw the movie in IMAX last Sunday, and loved it. Just had to get that out of the way.
[quote name='gotrice415510']i was watching Attack of the Show the other day and chris gore was saying that the only way to top this movie is to make the next one start years later. He said that the next movie should be when batman is old and returns just like in the comic book "The Dark Knight Returns". I think that is probably what it is being planned for the next Batman movie.[/QUOTE]
That would require recasting pretty much all of the characters to compensate for the age difference - aging an actor with makeup might work for a few scenes, but doing for everyone in a movie's cast for the entire duration of filming isn't practical.
Beyond that, "The Dark Knight Returns" had a plot that involved Two-Face, the Joker, and Superman. Given the ending of "The Dark Knight" and the fact that Warner Brothers might not be too keen on Superman appearing in the movie, a direct adaption is pretty much out.
I don't see it happening, and I don't even agree with the initial statement - Nolan can find a way to make a damn good movie, without resorting to what would amount to another "restart" for the franchise. I'm not convinced the next movie will be better than TDK was, or that there even is a way to top it given that they hit upon the perfect combination of a strong storyline, two fantastic villains, and (unfortunately) the death of Heath Ledger adding an air to the movie and its promotion that we haven't seen in a blockbuster like this before, and there's no way that's going to happen again.