The source is from 4Chan (aka not reliable, and did similar things with Skyward Sword among others).
The subtext means "Prophecy of Fire" and "Prophecy of Ice", but there's some issues with the way it's written, some people say it's grammatically inccorect, but I don't know Japanese myself.
Some people say it's 'Prophecy of Water', but wether it's Water or Ice... why is the logo looking like blue flames anyway?
The logo is actually weird even by Zelda standards. Look at the contrast between the 'ball' and the Zelda logo and the subtext. Something feels off to me at least, like if they had ripped the Zelda logo from somewhere and tacked it on top of their handmade logo, resulting in a difference of quality between the two. Maybe it's just me on that part though.
If there was such a news, it would have been all over more reliable websites by now. RPGamer always been on top of Zelda news. Searching for the subtext has no results, among others, so it didn't appear in Japanese either. So no news website actually back this up.
And honestly, when is the last time you've seen the logos of the game before seeing anything about said game, like screenshots or if Link is going to be as Toon-Link again?