I've always wanted to do a PZ machinima (at least, when the game's more developed and things such as animations come out). I figure it wouldn't be too difficult, given the text-based dialogue and isometric camera angle. But the game currently doesn't allow for much creativity when it comes to visual storytelling. I could use multiplayer but that would take a lot of time and effort, plus I have no friends who play PZ (or friends in general :P). So I think it would be cool to add a machinima mode, kinda like creative mode where you can direct and program certain events to happen, certain characters to do certain actions, etc.
Just something I thought would be neat.