A thousand :)
All I'm sure of is that I don't want to make this into an eternity game; I know the final scene of the game, and after that the characters will live happily ever after. Too many great fantasy series have been spoiled by overstaying their welcome :)
Have you thought of a spin off story of say a particular character in the story or group of characters, or particular sect mentioned in the story? Not now, but in the future if you have another project your working on or you just want to step away for a bit, let this story settle in for awhile and maybe come back later with a group of short stories that interconnect somehow, one chapter about one character, leading into another, then another, creating a book of shorts stories sort of weaved together, even if it isn't directly related to this story. Just food for thought. Thank you for all your wonderful work, I have a strong feeling no matter the genre this game will be a popular game for a long time to come.