The story actually kinda went nuts after SC IV, and then because the ending of "siegfried"(is that right?) in soul calibur IV is considered the real ending, i guess algol wouldnt make it, the problem with fighter games is that, it is hard to make every characters becomes prominent within the story mode. The story will becomes only focusing on one/two characters instead of many characters. Because of that, maybe that's why PS pulls out tekken time skip, where 17 years later, where it is the setting of SC V, and focus on the Alexandra's family, but then again it failed horribly, because it's too focused on the alexandra family. SImply said, for the story mode, the cast is too big...with some of the characters didnt appear. Project SOul leaks a big,handful of characters, so if there is going to be a story mode, we tend to think that those characters will be a major in the story mode, because they are named and for the most part very important in the story because they are playable.
So what i want to see, is that every characters plays a role that is pretty important in the story mode.