The Joker Revealed? Or not?

Interesting turn of events in the Joker story:

Movie sites such as IGN and ‘aint it cool news’ have taken this as gospel, and have run with it, posting the image for all to see and declaring that this is another piece of guerilla marketing from WB. However, if you take a closer look at the behind the scenes of the website, doubts begin to appear; at least for those of us willing to see them.