Board Thread:Staff Discussion/@comment-27901943-20190908135840/@comment-27901943-20190929162127

Jack C. Thomas stated the following in an interview: "I would say this: if you’re a fan of the franchise, and if you watch carefully, you will see Easter Eggs. But I’m not going to give you clues on where they are or what they are. I love the main franchise. I did 78 episodes of “Race to the Edge” and before that “Defenders of Berk”. It’s really important to me that we fit in even though we are a very different aspect of the main franchise. So there are references."

He clearly said that the mentions are just references, not actual connections.