Want to have vs need to have

  Five pages done last night.  I decided to make the last chapter double-sized.  There's a lot going on and a lot needs to be resolved.  I know what has to happen but I don't know what else needs to happen, yet.  That's what I'm thinking about.  I wanted to describe the Great Eyrie, it's my first and possibly only chance to do so.  But there are other things that need to happen.  Jael has to account for the things she did to Jacob, both to survive and because she chose to.  She has to be healed.  Jacob and Jael have to say goodbye and separate.
  But there are other things I want to do as well.  I want to introduce some of the Riders, some of the Rider Candidates; we'll be seeing both groups in the sequel. (yes, I'm writing a sequel, even if the original doesn't get published for a while I want to see what happens next)  I want to describe all the flying creatures the Riders use to keep the peace and to keep their land free. 
  But all the things I want to do are complicating the things I have to do.  That's what stopped me last night.  I needed some time to think about writing the ending in a way that makes the reader go "Wow" and maybe makes them cry.  And I don't think I can do that and put in all the things I want to do.  It's a puzzle.  I think I'm inclining towards a 'lean' ending that's focused on the 'musts'. 
  I should be done this weekend, epilogue and all.  Then I'll start a copy-edit pass by reading it aloud.  That should annoy and/or entertain the wife and the cats.