An update from Iger, definitely retiring July 2, 2019, mapping out the next 15 years of Star Wars:
We had to deal with tragedy at the end of 2016. Carrie appears throughout VIII. We are not changing VIII to deal with her passing. Her performance remains as it is in VIII. In Rogue One, we had some digital character. We are not doing that with Carrie.
I'm a bit underwhelmed by the trailer. I don't put much stock in them anyway, as I'm sure the film will be fantastic, but it doesn't get me as excited as the one for Episode VII did.
I also hope Rey comes from a completely different line. I don't think everything in Star Wars needs to be related or intertwined. It would be nice to see someone without any ties to current characters pop up for a change.
The best observation I've seen about the teaser is that it's meant to intrigue the viewer rather than blow them away with spectacle. It's supposed to make you wonder why Luke would walk away from it all, and if he can be coaxed back.
And out of all the trailers since that second Force Awakens teaser, this one is probably the least reliant on nostalgia. Most of the references to or appearances by original trilogy elements are either brief, distant, shadowed, or barely audible. Elements and characters that are new to this film or from the last film are mostly seen close up, or taking up the majority of the frame in comparison to any other elements.
Maybe that change in direction from the other films' trailers is a miscalculation on their part, but it's interesting.