How about the truth of it being that none of this part of the story ever existed until much, much, much later because "The Hobbit" was never meant to be a prequel to anything. It was a stand alone story and was never meant to be a tie in to the LOTR books until Tolkien decided to go full on George Lucas and take a giant dump all over his own story. Even his own publisher had to stop him from entirely rewriting "The Hobbit" and adding in all this other bullshit because they knew it was totally lame and would just ruin how awesome "The Hobbit" was as a stand alone story. Get a hold of the original Hobbit book and read it. There is absolutely no mention in that book whatsoever of Sauron, or the one true ring, or of any impending doom, or a necromancer, or anything at all that ties in to the LOTR.