And who says some prophecies aren't stupid? Narishma was a non-entity after he was bonded by that sadistic bitch, Merise. He can't lead anyone - you can't lead when you're a slave - unless the Aes Sedai put him in charge of teaching any men who can channel at the White Tower, so he can drive into their heads that they are property while he shows them how to use a power they'll never be allowed to touch without permission. He was never going to step into Rand's shoes and become the Dragon Reborn.

If Narishma fulfilling the prophecy by yanking the sword out does not apply, then the prophecy must refer to something, and someone, else. In which case, perhaps Moridin grabbing it fulfilled the prophecy in some way. He grabbed it, got taken over by Rand, and died in Rand's place. *shrugs* I don't know. It's left open to interpretation, I suppose, but the way I see it, it's fulfilled and done.