Okay then. So that's how you get one of the biggest names in the business to be in your film. Make sure he has a funny accent to play...and that the movie's about a guy who answers an ad to wear a walrus costume for money to appease some crazy dude's fetish.
Depp is presumed to play the French-Canadian inspector on the case, a role previously offered to Quentin Tarantino. Justin Long is the walrus, so presumably that makes Depp the egg man.
I'm still not sure exactly who this movie is for, aside from Smith himself.