I guess I'm in the minority that I really don't think Cassandra has much of a chance. If we're getting a sword and shield character at all, it would seem to me that it would be more likely to be Aeon, since it appears that he was meant to make an appearance, but wasn't, and his style is already partially in the game, with one borrowed move from Cassandra, while Sophitia has a borrowed weapon from Cassandra (Katzbalger). Aeon's model is already made, complete with his unique armor (even though it's literally copypasted from SoulCalibur IV). He has three weapons, two of them used (Iron Hatchet and Lunatic) and one of them not (Meat on the Bone), and his other four weapons could easily be Xi Sword & Game Shield (shown in his story art), Grudge Ax & Aya Shield, Tabarzin, and Kora, to give him a full set like everyone else.