Hi, I don't want to spoil your illusions, but I think that's not a good idea for a jam. Most people who join gamejams want to be creative, but you're limiting their creativity heavily by telling them to clone a specific game, just with a different art style - and on top of that, you're not even giving them the choice to choose whatever art style they like, instead you tell them exactly what they should do.
It could work if this jam was directed to gfx artists only, but then you would have to provide a running version of the game where they can simply swap-in their assets. But in the way the jam is currently set up, I doubt anyone will be motivated to join in.