As much as I love film music, unfortunately I’m not very good at guessing these. Maybe this is hope speaking as I would like to have this score on CD, but I’m going to guess Troll. It seems to fit the clue: Troll was released in 1986, one year after Re-Animator (both of which are in Intrada’s catalog). Both scores were by the great Richard Band and I’m pretty sure Troll was produced by Charles Band’s Empire Pictures, and I think he/they were involved in the distribution of Re-Animator, so depending on the definition of the ‘team’ behind both films that seems to fit, as well. I don’t know much about Troll’s score, but the original album was about 37 minutes so an additional 15 minutes seems possible.
Again, not always good at guessing these and I could be wrong, but this is my guess.
Actually it's more like 10 extra minutes now that I look at the final timings. But it's not Troll. Doesn't really fit the clue well enough.