Are there things that can be done with it aside from being on the planet? Yes. But really, why? Khan's dead. We know how he got there. We know what he did. Do we need to see it, too? His character is over with. Is it really that interesting to see him rule the Earth? Really? We get pointless stories about a dead character set back in a time that Star Trek canon but not Star Trek, and some actors who will NOT be the late Ricardo Montalban. Ricardo WAS Khan.