User blog comment:Hulk10/Heather and Fishlegs/@comment-352641-20160701215725/@comment-27609869-20160701225812

Luke Danger

The reason Heather is with the riders in the first place is because she doesn't have anywhere else to go, she doesn't know where she belongs. Once she becomes Chief of the Beserkers, she will realize this is her true call and her home. I'm willing to bet the lense Heather carries around is going to lead them to Beserker Island, and Heather is going to end up staying, taking a final farewell with the riders.

DWA implied Dragon's Edge is going to be destroyed by Viggo or Mala. So even the riders will not be staying on there for long. They will all return to Berk by the end of Season 4.