Quick question: How would you feel about a character claim?
If I'm able to open something up later this month, I'm thinking a fantasy noir murder mystery and every contestant will need to have some relationship to the victim in order for it to be plausible. Based on that 2-3 days before the contest officially opened I'd put up a character claim post. In that post you could each select the character you want to play and show off an outfit for the character. While you'd need to have a relationship to the victim I want you to feel comfortable writing the character so age, FC, and character traits would all be up to you.
Character Claim Sample