User blog comment:Hulk10/Heather and Fishlegs/@comment-28806012-20160629035917

Here's my thought. What if after hearing about Dagur's "death" the Beserkers want her as Chieftess, and she reluctantly accepts and has to break up with Fishlegs, which crushes both of them, until the Beserkers make her get married so they can have an heir to go on to and Heather gets the idea to marry Fishlegs and unite the tribes with Hiccup's approval. That way the Beserkers move to Berk and there's more dragon riders to train and Fishlegs and Heather live happily ever after?