Something I found interesting is that the 7th Umbral Era story will not be replayable. To me this sounds like it means that the current story will only be available until 2.0 hits and then it'll be gone.

My thinking is that whatever transpires by the end of the 7th Umbral Era story leads to the dramatic area destruction that we've seen in the concept art. It's likely being used to explain why the entire game will look different after 2.0. It's kind of interesting that those playing up until that point get the "Prologue" as it were.