Well guess what? Unless the franchise is taken out of Chris Nolan’s hands, it will never happen.

You see, that’s because in the “trying to be super-real” Nolan world of Batman, everything has to be believable as being possible within reality.  Now, if he had pulled that off as well as he did in “Batman Begins”, there would be little to complain about - but the reality is broken constantly in “The Dark Knight” while simultaneously trying to reinforce “this can be real”.  “This can be real… ignore the man behind the curtain…”

Either one has to let go of the whole “super-real comic adaptation” or make it a given that there are many fantastic things which can only exist within the world of comics – one of the greatest reasons comics have such great appeal.  You can’t ride the fence.  BB didn’t ride the fence, and it worked.  TDK rode the fence in ridiculous ways, and none of them because fantastic scenarios were presented, but because it was presented as realistic yet completely unrealistic things were utilized to move the story along.

Just step back and observe the tone of “Batman Begins” and compare it to “The Dark Knight” and given the background of how Gotham was presented in either one, how the story was played out, how the theme was established, think about which version of the Batman “reality” one could possibly see Superman showing up in.  Only in the world of “Batman Begins”, but now that possibility is gone.

So, if you ever hoped for such a team-up in a movie, and realize that will not be possible, you can only blame yourself for having gone to see TDK 2, 3, 4 or more times, shooting the box office for it up, and reaffirming to Warner Bros to keep Nolan on the ticket for the next one.  Pat yourself on the back.

The time period of the hospital evacuation segment is implied as being enough time to evacuate an entire hospital.  The initial moments of The Joker’s threat hitting the airwaves, Gordon is heard shouting to various police crew to evacuate Gotham General Hospital as the priority (and it happens to be the one The Joker picked).  Regardless, it’s implied that the whole ruckus about the hospital happened in less than 30 minutes since the Reese guy was about to go on a TV show to expose who Batman is (seems to imply a show teaser at the beginning of a 30 or 60 minute “news” show hosted by Gary Wallace from Weird Science).  So, it’s IMPLIED as being enough time by the dialogue of the movie but in reality it would take HOURS, if not an entire day, to completely evacuate an entire hospital.  If it was the case that there was such an evacuation ahead of time, and it was evacuated before The Joker went to Dent’s room, why was Dent not evacuated?

Why would Dent be the sole patient left (contrary to Gordon wanting desperately to keep Dent safe throughout the story)?  The implication, then, is that the hospital is being evacuated at the same time The Joker shows up to Dent’s room.  The entire exchange between The Joker and Dent took place over 2-3 minutes and when The Joker walks out of the hospital it appears to be fully evacuated.

An entire major city hospital evacuated in 3 minutes.

The realness of this movie is astounding.  Not to mention how much the building actually looked like a hospital from the outside rather than an abandoned building in the middle of an industrial zone.