A grain of salt? More like a bag of salt. A mountain of salt. The entire salt factory. The sum of all of Earth's sodium and chlorine atoms, representing the maximum amount of potential salt on the planet. That's the amount of salt that should be taken with this obvious (and repeated) hoax. For those who haven't read the other "rumors", here's what has happened so far:
Darkness of Tyvia "brochure" leaks with fake reveal date of E3 2014.
Additional "fact sheet" leaks, which includes a major typo. Then suddenly, the corrected fact sheet appears. Because apparently companies create fact sheets and brochures to pass around about their top secret game reveals. Then, when it's pointed out that they screwed up some spelling, they create another version and the same leaker just so happens to get their hands on that, too.
And keep in mind that E3 was listed as the reveal date, which obviously did not happen.
But far from undaunted, this same hoaxer continues making bogus media and his persistence is rewarded with even more news coverage, which will encourage even more of this behavior in the future.
In short: Come on, guys. Come on.