I feel that there is an alternate ending that leaps off too far into fantasy and there is an alternate ending that leaps off too far into pessimism, but that, in fact, the novel as it has developed should, if it's functioning correctly, have equipped you as the reader to make your own decision about where you want to go with that, about where you're going to fall on that continuum. So, the novel is taking you directly up to the point that you have to choose, and it's letting you do that.
