This was in the press release on the main page:
SONGS
"The Chopper" and "Grim Discovery"
Composed by Alan Silvestri
Courtesy of Twentieth Century Fox Film Corporation
So it looks like we're going to be hearing some stuff directly from the "Predator" score...
It could be a reference to the fact that we hear bits of the Pred score in Tyler's work, but we also hear cues from "Aliens," and "A: Res," and those aren't mentioned, so I doubt it...