I expect: all new songs (none of which stack up to the old songs--especially the remake of Three Evils known was The Suffering). They will play that long last track to play them off, and it wil be cut significantly.
What other bands have been on HRL worth noting? I know only of AFI and Simple Plan..
AFI issued five songs from their performance as a promo CD, free to anyone who bought Sing the Sorrow in late 2003 or early 2004, or ordered from their store online in 2004 or 2005.
Coheed has so many live songs on CDs, though, so I wonder if they'll do the same.