I know that it's almost impossible to overlay lasedisc chroma to BD luma perfectly (even if I could tell that sometimes is possible with DVD luma); I have experimented my own ColourMatch avisynth script, with good results, in my "The Thing" project, matching laserdisc chroma to HD-DVD luma; but, because laserdisc has some clipped whites, I preferred to overlay the resulting ColourMatch chroma to HD-DVD luma: result is not perfect, but very very good - take a look at the thread, there are some screenshots there. There are few scenes where the result is less good, but the same don't look good on HD-DVD either, so...

I'd like to test my technique on Disney - I dare to think it will be easyier to use it with animation instead of film, as there are less colors to mimic... well, if someone want to send me 1min lossless clip from BD (with wrong colors) and from DVD or LD (with right colors) I'll test it ASAP!