This one seems to be lacking something. Yes, it's only a 2:29 minute run time trailer but without a lot of the important cog pieces that made the machine work so well, Kiera and Orlando, I think it may lose some of that magic that made the first two so good.
another thing is missing here
we don't see alot of CGI effects in the trailer
personally i'm fine with that, but still it's weird for a 3D movie