Yes. I should be able to add subtitles using multiAVCHD too. I’m thinking I’ll keep the audio options ‘official’ for the 50gb version, which would be:

English DTS 5.1 (1977 70mm mix)
English DTS 2.0 (1977 35mm mix)
English DD 2.0 (1993 Laserdisc mix)
1993 Laserdisc Audio Commentary
2004 DVD Audio Commentary
2004 starwars.com Audio Commentary
2011 Blu-ray Audio Commentary
Music-only Audio Track DD 2.0

I personally like the comedic/fan/podcast commentaries, but they will still exist on the 25gb release.