How history repeats itself

[Thulorongil]

That's all similar to what I was thinking about the hobbits. There's also the fact that after Morgoth was defeated, everyone thought that the great evil was mostly disposed of. Then a new power came along out of the rubble of his master's defeat. That and the fact that after Isildur lost the Ring, most people forgot about it and it became a renewed threat seemingly out of nowhere parallel the hobbits being the big heroes who came out of a remote area of the world after no one even knowing they existed. Whew, what a run-on sentence that was! Basically, enemies seeming to come out of nowhere/hobbits seeming to come out of nowhere.

Oh, and the little minor question about Beren & Lúthien:
Lúthien's spirit left her in her sadness after the death of Beren.

...and she knelt before Mandos and sang to him. The song of Lúthien before Mandos was the song most fair that ever in words was woven, and the song most sorrowful that ever the world shall hear. Unchanged, imperishable, it is sung still in Valinor beyond the hearing of the world, and listening the Valar are grieved. For Lúthien wove two themes of words, of the sorrow of the Eldar and the grief of Men, of the Two Kindreds that were made by Ilúvatar to dwell in Arda, the Kingdom of Earth amid the innumerable stars. And as she knelt before him her tears fell upon his feet like rain upon the stones; and Mandos was moved to pity, who never before was so moved, nor has been since.

So Mandos gave Lúthien two choices: To be released from Mandos and go to Valinor to dwell forever, but Beren could not come; or to return with Beren to Middle-Earth, but without certitude of life or joy.

Then she would become mortal, and subject to a second death, even as he; and ere long she would leave the world for ever, and her beauty become only a memory in song. This doom she chose...

They went off and lived alone and no one heard tidings of them again.