Glimpse of the Echo Chamber strike, which looks like the most teamwork-oriented Strike that we've seen in Destiny so far.
The armor doesn't look as terrible in motion (except the Warlock's) as it did when revealed.
The Nightstalker is one bad mutha...
The Jade Rabbit gets almost no focus, but it seems like its exotic nature is difficult to convey, since it's mostly damage-based (I like that they snuck in a Hawkmoon into the trailer, lol).

Seriously though, love that music!

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I loved the new stuff we've heard in game so far in orbit and on the Title screen.

I wouldn't say that trailer music is bad by any means, but I feel like it could have come from literally anything.

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In case you were wondering that music is called Sanctity of Sorrow, part of a stock pack called Damned Anthem, and put out through position music.

It's being picked by the trailer editor, and isn't part of the taken King music.