Absolutely 100% fake. An internal Nintendo document wouldn't get a first party title wrong (Codename STEAM, not "Project STEAM") and wouldn't spell "Chronicles" wrong.
It's a fanboy wishlist. I'd love to see a full Fire Emblem on Wii U, though, and I am expecting a Direct this month. Given the almost total lack of confirmed release dates, I'm thinking it'll be sooner rather than later.