Not that it should inform it at all, but there are exactly 8 principal characters seen in the trailer- Thor, Hela, Loki, Valkyrie, Grandmaster, Heimdall, Skurge, and Hulk. I don't think Heimdall would be included, though this new look is pretty interesting. I kind of think there may even be two different versions of Hela, one without her headpiece where her costume looks more green and then one with, the costume taking on more of a strictly black look.