just like there was nothing about Guardians of the Galaxy on Marvel's site when it was leaked how many months ago?? we knew about Guardians of the Galaxy happening long before Marvel actually officially announced it.
And while it's possible that the story is true, it's also nothing new, nor is there any evidence this is the same situation as the Guardians scenario. It is just as, if not more, likely that it's more like the British tabloids, who are widely known for making up movie rumors out of whole cloth. Especially as far as James Bond movies are concerned.