User blog comment:Mr. Xemnas/Fin Fang Foom for Iron man 4 WHO'S WITH ME!!/@comment-5977347-20130225222641/@comment-1895174-20130225223450

I think Kevin Feige has already said the rings aren't Makluan, but that could always be a misdirection.

There were also rumors of John Goodman voicing Galactus in Fantastic Four: Rise of the Silver Surfer, so don't take any rumor like that too seriously.

And the after-credits scene for Iron Man 3 is most likely going to tease either The Avengers 2 or Thor: The Dark World, the most immediate film after it.