Perhaps the best way to approach the HIStory tour would be to put out a TII-style documentary? That way they could include some live performances from the Royal Brunei show, some rehearsal footage and then footage from the actual tour. It would be a good way to release the footage and skirt around the fact that about 80% of the set was mimed, whereas if they released a full concert from beginning to end, it would probably reflect quite badly on MJ to people who are perhaps unfamiliar with this tour/era of his career.
The way I see it is this...
Virtually everything MJ did from 1970 onwards was amazing.
His solo album career was very virtually perfect.
Then you have HIstory 'live' which even his most loyal fan base is divided on (and from I see primarily against) so why release it?
I would say artistically from his solo adult career it was perfect with only this tour, the 2001 MSG shows and half of Invincible being under par.