Not sure exactly what you're meaning... Have the artists do their rendition of 'hamsters' for example and end up with a bunch of hamster sketches from various artists?? lol.
I am working on having specific artists complete a favorite comic cover of mine. The first will be here later this week. I want to eventually get Hall, Tan, Laurange, and a couple more. Kind of like what you're thinking, just a different style/medium on each.
BUYING: 2001 UD NFL Legends Autographs - Daunte Culpepper - $300. Steve Young - $350.
BUYING: 2004 Ultimate Collection Jsy/Autos/25 - Culpepper, Carr, Theismann, Brady - Paying $450, in case you like money.