One theme I've been toying with is "what would a classic figure look like in the future?" For example I have a toon that is an homage to the Shadow, and one of his looks is what I think the character might look like a 100-200 years in the future. You could call it Future Classics or something. You could do it with any figure too. What would a future cop look like? a Hulk? a Batman? an Inspector Gadget?