Prepare to have your mind blown

[Inzoum]

Here are the options I see:

20+ years pass between Dalamud's impact and 2.0, Players 'wake up' in the future somehow
-or-
The 7th Umbral is actually an echo experience and players are really living in the 2.0 future.
-or-
Dalamud is sent back in time before it hits (Atomos?) and it alters the present day as a result.

Actually, there's a 4th option:

Screw the story, let's just blow up the world so Version 1 ends, and Version 2.0 starts fresh as if nothing ever happened, like a new game, but where you get a head start with quests done and levels and whatnot if you've played Version 1.

Personally, I think it's going to be #4, even though that'd be the most disapointing, storywise