On second thought, I don't think Dalamud will ever actually touch down.

In the quest "Ceruleum Shock" Cid tells us that the reason for the disturbances in the Aether's flow is because of Dalamud. And that has back when Dalamud was a mere dot.

I believe the Empire has found a way to control Dalamud and will bring it too close to Hydaelyn causing the Aether to go haywire and thus alter Eorzea from within.

Pretty much I think they're trying to crystallize the Aether, and Dalamud will do that all in one shot.