I really want to see preservations of the Japanese 97SE laserdiscs since I’ve read that those have the best color of the various editions.

edit: this release https://www.lddb.com/laserdisc/00008/PILF-2860/Star-Wars-Trilogy:-Special-Edition

redvdit.net http://redvdit.net/best-ways-original-star-wars-trilogy/
Released in November of 2000, in the twilight days of the Laserdisc format, which would be over in a commercial sense by 2001, this is the last issue of the Original Trilogy on the Laserdisc format. The video transfer uses the same exact base that was used to create the 1997 US and Japanese box sets with identical subtitles to the 1997 Japan box, but takes advantage of three years of innovations, such as a lowered brightness level that increases contrast, and a slightly more natural color timing. Skin tones look remarkably better than their 1997 counterparts. The soundtrack presentation is exactly the same, with both Dolby Surround tracks, and discrete Dolby Digital tracks as well.