Fuzz, that's really cool of you. I'd say though, that if you want D13 to consider your character design, you'll need more than a picture. D's been working on this for a very long time, and has a pretty intricate back story, with good reasons and descriptions for why each of his monsters exists. You'll need to read his story, then not only draw your character, but provide a good back story for it, as well as how it moves, how it attacks, it's weaknesses, it's attitude and so on.
I know when disturbing sends me stuff to animate, he gives a really good description of how he wants the character to behave. This kind of thing is essential to a team project, as it means everyone can be creative, but shares a similar vision of how the end product should look.
Best
Butters
