I just hope they put updated "heavy metal" in the movie and not crap like Nickelback or Creed and call it "heavy metal." The music was a huge part of the original animated movie so they need to not screw that up. I would expect to see(read:
hear) Avenged Sevenfold, Iron Maiden, old Metallica(pre-black), Trivium and probably Disturbed. I would hope to hear some non-mainstream metal though, like Abigail Williams, Skinless and The Black Dahlia Murder. Black and Death Metal FTW!
On another note; Kevin Eastman? Wow. It is awesome to hear that name again. I was a HUGE TMNT fan as a kid. Like, HUGE. Some of the original comics were effing amazing. So, it's good to know he is active. I wonder if Peter Laird is up to anything.