I've numbered them, to make it easy to guess what they're spoilers -to- -- some are easy, some trivial, some pretty hard. drcpunk is ineligible because she guessed most of them already and was told the rest.
- It's a sled. (fleetfootmike)
- He's a she. (easy, but arguably devotedbear. Ambug was the first to name it, though)
- They win. They win, but the king still dies. One wins, two lose, one doesn't play, all but one dies, and he's not the one that won. (kokoinai)
- After going to the moon, they come home. (stormsweeper)
- After going to the moon, they go into space and conquer the galaxy.
- The big bad guys lose. The big good guys have left the building.
- They do, in fact, find the promised land. And keep it for a while. Here are some rules for you to follow. (fiddledragon)
- He loses, but gets a new job, and so do all his friends.
- They win. But that's boring, so they start over again. (tirerim)
- They die and go to heaven. (fiddledragon)
- Five return, and one goes alone. (fiddledragon)
- Some go, two stay and rule. And two stay for a long while, and then go.(fleetfootmike)
- They live happily ever after.
(the last one's not worth guessing, but it's the only spoiler without a specific behind it)