. I hope they tell us how it ends, even if they can't finish the book.
It worked for Clavell in Shogun, certainly. Hundreds of pages of story, followed by two pages of "and then here's what happened".
Of course, "worked" in this case is in the eye of the beholder. For myself, I was really angry at the way Clavell wrapped it up. But seeing as how ol' RJ's, you know, dead, I think I'd be more forgiving of an epilogue in which his brother chimes in and says "hey, here's what Rob said would happen at the end."
But it's all academic for me anyway. I gave up around book eight.