That sounds kind of dumb to have Link bump into an incarnate of himself. I don't really subscribe to their ideas. I think they just made them up. Same time period? Do they know anything about the old Legend of Zeldas? Every game has taken place in seemingly the same time period.
However, if Link were to peer across time and see another Link, it might make sense. And by some chance, if the gap between times were bridged, it might get awfully enteresting.
Maybe we'll have a Temple of Time to go through this time... I think that would be cool. Imagine fighting old bosses.