I don't believe the rumor, since it's kind of coming out of nowhere. And with the Metroid Prime Trilogy rumor, too, I don't think Nintendo is going to release two super high profile ports right near each other. Another factor being that Nintendo evidently doesn't like doing ports unless they have something to add--and they already added stuff to WWHD and TPHD, so what else could they do?
But I bought Twilight Princess twice on Wii (because I lost the first copy, only to find it under a TV somehow), once on GameCube, and twice on Wii U (physical and digital).
I'm always ready for round six.