Something I notice on the recent Live Letter

[Enkidoh]

SE confirmed that was actually a mistake though - it really was meant to be actually Nidhogg in the Heavensward opening movie and not Hraesvelgr. Apparently Square Enix Visual Works (who made the trailer) were given the wrong concept art and thus rendered Hraesvelgr in that scene by mistake, and by the time the FFXIV Development Team discovered this error, it was too late to change it, so they just handwaved it away.

This isn't the first time after all that a FFXIV CG cutscene has had a lore/setting contradiction in that was revealed to be an error made by SE Visual Works (Derplander's elezen BLM party member in End of an Era is actually meant to be the female GLA from the Echo scene in the original 1.0 opening and not the male elezen he was chatting with in the Adventurer's Guild, 1.0's opening movie featuring a totally different design for the Adventurer's Guild complete with aetheryte in the centre and adventurers using all kinds of crazy attacks that were never available in the game).

So basically, don't take that scene as gospel as far as the story is concerned, and just enjoy it for what it is, a thrilling introduction to the expansion.