If we are going to extremes, you could have taken my "happy ending" statement to mean that everyone who had died in 1 and 3 would also return to life. Obviously DR is not going to end with a "happy-go-lucky"(???) ending. A movie can have a happy ending while also having bittersweet moments. Star Wars OT had a happy ending, and yet Luke's dad and Yoda dies in the same film.
Well, the definition I could find for it:
And that's what I was addressing. I don't really feel like an ending that ends on a good note but with an underlying tone of loss and grief can be called "happy."A clichéd conclusion in which all loose ends are tied up and all main characters are content. See also happily ever after.