Son Of Sparda
Member
The Omen isn't a dream but more like a future that Noctis is destined to happen. However, it seems like Regis doesn't want it to happen and so he kicks off the events of the game. This is presumably why the bros come with us, in order to make the Omen not happen.
So I think this trailer shows us the extreme end of what would happen to Noctis. The game will probably have Noctis struggling internally and maybe falling to this side but will probably be saved by the bros
That's what I think anyways
Déjà vu? lol