My two cents: the possibilities could be:
- A new mix, along with a fresh remix of the Shrine Auditorium performance.
- A new mix, paired with an unreleased show, possibly from Liverpool or Lakeland.
- The inclusion of original, surround sound, and Dolby Atmos mixes.
I don't see any Headley Grange stuff being released, or any other rarity from that era, unfortunately. Maybe some interviews and/or an extensive booklet?