He says "Awe, you guys have no sense of humor XD, it was fun looking at all you guys speculating about is this poster fake or not, but as all of u already know ….both are fake and both are made by my."
There you go, confirmation of what we already knew, the poster was fake. Below are both versions created by Marobot. Of the two, the second is much better. If it had been "leaked" first, I think more people would have been debating more fiercly about its legitimacy.
Note: Enlarged poster here. Looks cool though.
Source: Transformers Live