The video would be taken from Mother's PAL sets (after all a German set has to be in PAL, and Mother's sets are the best, qualitywise, hands down). Furthermore I'd like to include both German and English audio-tracks, an isolated score track (which set were they on again? I only have it on the "Star Wars Classic Edition"), several audio-commentary tracks (the one on "Classic Edition" is a pretty nice edit from several interviews) and maybe different angles for both German and English opening cards and crawls. All this stuff would of course justify a dual-layer disc per film, but as DL-discs are getting cheaper, this wouldn't be a problem I guess.
Audiowise I encountered a problem though... as a start I checked if the audio from my rip of the German THX-LDs does sync up with Mother's set, and it doesn't! So, where would I get a German audio track that does? I wouldn't mind editing them in Premiere to match up, but I am low on HD-space right now.