Christopher Tolkien to finish lost Middle Earth novel

[Aiwendil]

Does this make any sense at all? The story originated in the BoLT (circa 1917), & the Narn was composed in the 1950's.

It makes very little sense as stated. However, one certainly could see the 'Narn' as a rebuttal of the 'ubermensch' in a different context. Tolkien draws, of course, on the whole body of Germanic myth concerned with Siegfried/Sigurd and the Volsungs - the same body of myth that Wagner drew on (Tolkien would probably say 'perverted') in his Ring cycle. If there's any connection between Nietzsche and the Turin saga surely it lies in the analogy between Turin and Siegfried.