[Maédhros]

From the Later Quentas

Here ends The Valaquenta. If it has passed from the high and beautiful to darkness and ruin, that was of old the fate of Arda Marred; and if any change shall come and the Marring be amended, Manwë and Varda may know; but they have not revealed it, and it is not declared in the dooms of Mandos.

The Second Prophecy of Mandos (V.333) had now therefore definitively disappeared. This passage was used to form a conclusion to the published Silmarillion (p. 255).

The question for me is does this means that the Prophecy actually dissapears from the Legendarium or only in the lore of the Elves.
As it has been posted before, there were prophecies by mannish traditions regarding the end.

One way is to preface the whole thing with a completely fabricated statement of the sort: "Among Men a tale is told of the Second Prophecy of Mandos, and that tale is here given." I don't really like that, as it is, again, a complete fabrication. Another way, very similar, would be to replace the first sentence: "It is said by some Men that Mandos spake thus in prophecy, when the Valar sat in judgement in Valinor." However, we still have a problem with excessive creative writing.

With the risk involved in this, I would favor not using the Prophecy, unless both of you think that an alteration of the kind that Aiwendil made is acceptable.