If i were notch/jeb i would add STAR TREK SHIPS!!! You can craft an item that when used it makes a shipyard, When you put 2 stacks of blocks into it, you have the option of what ship u want, u select that, and u go into space with NPC Crew, and then, it makes randomly generated wormholes, planets, space stations, and more ships. You can fight with phasers, photon torpedos, shuttle craft. Its very complicated, but i think it would be fun!