FWIW, one of the rumours about the 'problems' in recovering the episodes was that the person who was holding them wanted money for them, and BBC Worldwide didn't have enough on its own, so they were having to work out how to find the funds within the BBC as a whole (the BBC having decide to bite the bullet and ignore the legal technicalities about buying back their own property).
That version of the rumours said it was Enemy of the World (which would be put out on DVD first), Marco Polo (to be run on BBC4, hence they could put in money for it) and Web of Fear (no plans rumoured, which might make sense if it was still one episode short of the complete story).
No idea if that is what's happened, but it now seems more likely that it might be.