Probably the most exciting aspect of this trailer, for me, was the exploration of Ezra's turn to the dark side. Rebels, for the most part, has felt a lot more cartoony than the Clone Wars for me, and with this the storyline is going to get more dark and dramatic, which makes me more interested in it.
But I have mixed feelings about Thrawn. It'll be cool to see him in the show, absolutely, but showing him now lets the audience see him as an underling instead of a leader like in the books. It takes a little bit of his influence away. Not sure how I feel about that.
Otherwise the trailer looks alright.
