Before doing anything with the DTS, it seems to me it would be helpful to verify whether there are actually any differences from the Bluray audio. I attended a triple feature screening of all three Batman films at the Cine Capri in Phoenix when The Dark Knight Rises was first released (shown at 2.35:1 aspect ratio), and as far as I could tell, the soundtracks seemed to be exactly the same as what was put on home video.

If the Blurays do indeed use the same audio mixes, as I strongly suspect they do, then there would be little purpose in going to the effort synching and editing together a lossy source when full quality lossless versions are available.

(DTS CD-ROMs are said to have a bitrate of 882 kbps for their five channels of audio—they are good quality for sure, but not as good as real PCM.)

I would be willing to investigate the DTS soundtracks and make the necessary comparisons. If it turns out that some kind of remixing did take place, we'll chalk it up to the fact that I was sitting off to the side of the extremely crowded theater for the screening. ;)

Editing to add: I can't speak to the colors with complete authority, but I remember trying to spot any differences and concluding that if any regrading had been done for video release, it was subtle enough that it didn't stand out in a significant way.