That is true. The thing with the trailer was, that it was borderline becoming a comedy. A more serious tone would be more appropriate... Remember that Taken King intro??? Awoken getting decimated, Oryx being a real menace... The feeling that you were getting was that Oryx was a real threat and a really powerful one. The same was with Rise of Iron... You could understand from the video that Shiva IS a threat. Now imagine these intros with Cayde interrupting the narrative , to crack a joke. This works only if you are Deadpool.