Here we GOOOOOOOO. I love the first game so, SO much. Must have watched this trailer five times already. Cannot wait to obsess over DS2 for the next however many years.
Start of the trailer had me wondering if we'd perhaps be playing as Fragile this time around (especially since we see her paired with a BB, presumably Lousie from the first game), but with the introduction of the older (timefall ridden?) Sam later in the trailer, I'd imagine we must be sticking with him as our player character. The crew that Fragile is bringing him into must be where Elle Fanning and the rest of the new cast come into play.
Also interesting: the mask seemingly modeled after Amelie's face that the guitarist is wearing at the end.
This is the kick I need to finally give the Director's Cut of the first game a go in full, too. I've explored it a little bit, but haven't done a proper beginning to end playthrough of the DC.