Where are you going to source the trailer shots you intend on using? Do they exist in high bit-rate form somewhere?
I found this website which seems like it’ll help: https://thedigitaltheater.com/category/movie-trailers/lossless-movie-trailers/
Although I believe they only have the three main trailers, so if there ends up being anything in the TV spots or anything I want to use I’ll have to find something else.