They're saving that all for 3.X era.
After all part of the reason why 2.X era story was a bit bland was because there was nothing for the story to follow up on in 2.0.
With 3.0 ending, SE has a bunch of things they can cover through out 3.X era.
So we have...
SPOILERS
1) Garlean Empire and their rising power now.
2) Ishgard development as part of the Eorzean Alliance.
3) Development of peace between Dravania and Ishgard
4) The Warriors of Darkness
5) Nidhogg's return and maybe saving Estinien from his possession.
6) Hunting down Ilberd and the Crystal Braves that sided with him.
7) Finding the missing Scions.
ya it is a lot of plot to cover but it gives them something to follow up with 3.0 storyline.