I am a little puzzled by the article which says "It's safe to assume the score will be similar to the BotCon 1997 exclusive CD that was released, featuring some of the background score and alternate pieces. ". The album was available to order online from 3H's website, along with the score album as "Lighting Their Darkest Hour", and had all of the background score not some of it.
The original BotCon release (Til All Are One') did NOT have the three score tracks that were on the OST. The 2001 release did, but it doesn't include the Legacy piece like the BotCon one did (either for space reasons, or because it was on the other CD with the other demo-y stuff)
Oops, yes. Forgot about those 3 tracks, I have them sequenced in already in iTunes. Regardless, that is somewhat more complete than "some of the background score"