But, as with past previews, please do not analyze or dissect or argue about the preview here. That's what Tower of the Hand and Winter Is Coming and Westeros and Television Without Pity are for. (And lots of other swell sites and blogs and bulletin boards as well, sorry I could not mention you all).
For more, alas, you will need to wait until season four debuts on April 6. (Unless you happen to live in Santa Fe... )