If she is a console character, I think it would be safe to assume that both her and Elizabeth will be in the series for a while. Ash, Vice and Mature are the only XIII characters that won't be appearing in another storyline game.
Also, I really hope SNK doesn't make Saiki playable. He's a cool boss, but he'd be no fun to play as. He can't jump, can't crouch, only has three normals, etc. etc.
vice and mature have been dead for the longest time and yet not quite gone. besides the fact that there are 2 endings, ash isn't even human. for some reason, the fact he never got around to take Kyo's flame makes me wonder if they skipped to the ending with this game?
i do hope they make a human saiki from scratch.