10 Commandments for Middle-Earth?

[lindil]

Of course, by the quote above, you could say (from a technical standpoint) that Tolkien still could suppose the incarnation to eventually take place without writing it into the story.

Yes, and he felt, apparently, that pointing to it, via the Athrabeth was as far as he could go in the context of the Legendarium.

Bt I must confess, I do not quite understand why someone who would write an entirely new creation myth, and postulate several apocalyptuc scenarios [Second Prophecy of Mandos] would feel constrained by the Incarnation...