Unfortunately, the source of all this, the
25th world hobby fair site, deleted the part about the Hayate announcement soon after it was put up on the webpage. This means that the info was either false to begin with, or it was not meant to be announced at this point.
In any case, as of right now, a Hayate anime is still unconfirmed.
Edit: Personally, I'm leaning towards (hoping for) the latter though. I think we'll hear something more concrete soon.