Entertainment Weekly has revealed a few, along with some cryptic hints about what each character might be doing, and where in the story each trailer scene may take place. Vague minor spoilers may be involved – we now know that the Sith with the crossguard lightsaber is male, and not named “Darth,” for example.
I should note that nothing here sticks out as badly as Dooku, Elan Sleazebaggano or Dexter Jettster. You have to have the balls of George Lucas to get that silly with it.
HOWEVER: “Poe Dameron” is just one letter different from “Cameron Poe” – who is Nicolas Cage’s character in Con Air!