After months of speculation, the new issue of Doctor Who Magazine has confirmed that the main version of Shada presented will be the 102 minute, 1992 VHS release, which included added effects, music, and linking narration by Tom Baker. Though no other R2 information has been released at present, the R1 details indicate that the set will also contain the re-interpreted version of Shada featuring Paul McGann that was produced by Big Finish and released as a Flash animation during the 40th Anniversary for (and still available from) the BBC's official Doctor Who website.
Other features (R1 details) include a documentary on the troubled history of Shada's production, Taken Out of Time, a look at the story's locations in Now and Then, the first part of a feature on Doctor Who's first producer Verity Lambert in The Lambert Tapes - Part 1, memories of the Doctor's honorary companion in Remembering Nicholas Courtney, another companion profile with Doctor Who Stories - Peter Purves, plus Strike! Strike! Strike!, Being a Girl - Women in Doctor Who, and Those Deadly Divas.
Region 1 details thanks to TVShowsOnDVD