I never really cared enough to read Dampierre's profile, but from what I recall, Raphael's profile is all about him being locked away and after he escapes he searches for Amy. Its a quite simple story and its easy to implement into the game.
Nightmare now may be an entirely different person since, due to the story being rewritten, Soul Edge may possess someone else.
Astaroth, I don't know, he may actually stay dead, I don't think he is that popular, maybe they'll swap him for Ashlotte? I really hope so, 'cause I like her, because she is the only robot of the game.
Since Yoshimitsu I's death is a result of Cervantes' actions, like I said, maybe they'll rewrite the pirate's story, and as such, Yoshimitsu I's fate is changed as well. Yoshimitsu is a title to the leader of their clan, so Yoshimitsu II may still be there, maybe just not as a leader, also, remember how in SCIV's story modes, Yoshimitsu always had another Yoshimitsu alongisde him? That could have been Yoshimitsu II with the white and red costume.
Keep going, I'm loving all this speculation game!