I would really like to be able to add or switch cars on all the rides and coasters. A proper military jeep, like the Indiana Jones ride @ Disneyland, or like a space fighter skin to a coaster ride, or a different boat skin for the Island Adventure tour. It would be cool to use a cop car skin, with the other Go Cart rides...cops and robbers chase... anyway, being able to change skins on all the rides would be very cool.