Yeah.
This is the first version of Snake Eyes' backstory (that I've seen anyway) that ever explained how he came to be in a Ninja clan in the first place. Prior versions start with him just being there, lol.
So the dude that Snake helps out in the trailer and invites him to Ninja-hood should end up becoming Storm Shadow if I remember correctly.
Also looks like Scarlett and The Baroness is going be in this as well.