[Rhun charioteer]

Imagine this... Frodo manages to overpower Gollum and throw him into the lava. He then pushes Sam aside with the Ring. The Nazgul return and Frodo only exerts limited control over them before he is lead to Sauron and either killed or turned into a wraith.

With the Ring back on his finger Sauron comes forth from Barad Dur in triumphant confidence. Aragorn and the army of the west are smashed and Gandalf is killed.

The elves take their rings off and make a mad dash with every available ship to the west. Lothlorien and the Woodland realm hold out for months before the forces of darkness overwhelm and encircle them. Galadriel and Thranduil are slain. Some of their people do make it to the ships and flee.

Gondor falls quickly and the forces of Rhun smash the Dwarves and Dale. A combined force from the northwest, south and east strike the residual forces of Rohan and sweep them away. The remaining men of the west Dunedain and middle men are either killed, enslaved, or swear fealty to Sauron the Great.The shire and Eriador burn.

In this dystopian scenario with the elves having fled or dead, and the free men broken utterly, and with the Istari mission an utter failure with Gandalf presumably killed again would the Valar intervene directly? Or would they nurture every flower and seed of resistance as Gandalf hinted but leaving Middle Earth under Sauron's thrall for millennia anyway?

Thoughts?