User blog comment:DiegoAnime3000/Black is for Polarity/@comment-3146930-20140110104132/@comment-3146930-20140110222638

A lot of the powers Weiss uses in the White Trailer don't seem to work the same way as Dust does in the series. Not to mention that there are some theories that the trailer was all in Weiss' head and was metaphor (this is somewhat supported by Weiss' reflection appearing her own eye instead of the armor that she was looking at). In the series, Dust seems to be Elemental based. with Glynda causing ice storms and Cinder unleashing blasts of fire. It may also be Energy based as Weiss claims Dust is energy and Glynda was able to move some debris. In the trailer, even the way Weiss uses the platforms is different; as they seem to transport her around the room instead of just making her fast like they do in the series. The only power that seems the same in both is the ice. I think maybe the trailer was made before the crew had an accurate idea of how Dust would work in the show or decided to change how it worked, but already had too much done on the trailer.