I have fault with the "Old Dragon Lore" terminology you're using. We know that Blizzard had at one time anticipated including a landmass called the Dragon Isles. Not that they had fleshed out lore for the Dragon Isles, but that they were a possible inclusion, at one time, to the Vanilla WoW map. They ended up cut. For a game that was in development nearly 19 years ago. Very little (if any (edit: I forgot about one instance in BFA)) lore directly or indirectly references this one piece of cut content from vanilla WoW. You (and others) somehow believe, FIRMLY, that any "hint" that references DRAGONS, at all, must directly be referencing cut content, that has not been utilized in game, for 19 years. That's almost as much of a stretch of having a cat themed expansion because of a cat pack.