I still don't get why some people think she's flat...
I read in a Youtube comment, and I agree with it, that we do see emotion on her face but it is in the flashbacks. Walking with Maria Ramboux, reaching up to run her fingertips along her airplane, when she's reaching out to 'touch the stars...' From the sounds of it, she's been 'brain-washed' by the Kree and she's trying to find out about her past, not knowing where to start or who to trust. If that was me, I would be walking around behind a 'brick wall' too.
That being said, this is a minute and a half from a two or two/half hour movie, focusing on more of the intense Welcome to Earth moments. Admittedly, I haven't seen much of Brie Larson, but I thought she was great in Kong, Skull Island and I'm thinking we'll see a different tone in the second trailer - or is it the first trailer and this was just a teaser..?
Anyway, as of now I am all in!