Okay, I've added this note to the OP:
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// Mod Edit:
For the PC note, since it seems to be people's main doubting point, here's the actual quote:
"First off Dark Souls 3 is coming to PlayStation for and Xbox One in 2016. PC is listed, but it says 'negotiable' next to it."
PC is listed as a release platform, so this would most likely refer to the date, or if it's a retailer focused document, is in reference to how buying the SKU is negotiable given how many retailers no longer sell PC games.
I wouldn't let this effect my assessment of the rumor's veracity.
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I also put in the rest of the screen.
Makes a lot of sense to be retailer focused, it even explains why they even have screens, and bullet points like "15 NEW BOSSES", "5 BILLION WEAPONS", it's something that would be on GameStop's preorder page the moment they announce it at E3.