Will the isolated score still be a feature of this when done or is that scrapped?

It is my favorite thing about the editdroid trilogy.

Also what about the rare documentaries and press books and presskits?

The magazines and etc.

Or were those only features of the mega set that you have since jettisoned?

I can understand the point of not doing the theatrical now that it has been released on dvd, albeit in 5.1 sound lacking the original 2 channel PCM.

I would not know the first thing about adding the laserdisc audio from the 79 theatrical to the new dvd as a custom for myself.

Since the film was not released in 70mm and 6 track during the premiere in 79 i am lead to assume this 5.1 was a remix of the original audio from the 2 channel. Unless there was a re-release in 70mm and 6 track and i can find no info online of such except your mention of the sit and prosper marathon.

2-6 were released in 70mm and 6 track so their dvd mixes are essentially authentic remixed versions of the 70mm audio on dvd in 5.1.