Brutal Legend: Do you get anything extra for completing everything?

At the end of the game, Eddie Riggs says he'll be right back, he has stuff to do, and the game opens up again so you can finish things. I was wondering, if I bother to finished everything, will he say something different? (I know I'll get achievements for doing everything.)

No major spoilers, please!


Solution 1:

Just concept art, and a really excellent soundtrack of metal.