Clarification: I never saw a scope DTS trailer on LaserDisc, only DVD. Same goes for the Dolby trailers.

It'd be nice to at least get the AC3 audio preserved from the THX LaserDisc trailer because on most titles, it sounds REALLY good. Mission: Impossible Comes to mind.

Maybe we should start making a definitive list of all the variants of each trailer. For instance, Dolby City. We should find a flat and scope version (may have to make a scope version with some masking). Also, some LD versions of City had the Dolby Surround AC3 Digital instead of just Dolby Digital or even Dolby Stereo Digital (like on the Dolby Train Trailers). Not sure if any of them had wildly different audio. Train has some variants in audio. Temple and Canyon are the only other ones on LD I remember...both sounded amazingly good.