The Simpsons, created by animation and comic fan Matt Groening, has brought on another underground animation great to do the intro. I only became aware of Bill Plympton a few years ago when I picked up The Animation Show Seasons 1 & 2 on sale. You might not recognize the name, but you will recognize the style instantly. There is a playful, haphazard, almost dark quality to it that positively courses with energy. A work of his has appeared in all four seasons of the Animation Show, which should give you an idea of how respected he is. In fact, in his last full production, Hair High, two of the characters were voiced by Matt Groening and Don Hertzfeldt.