This is a licensing Expo poster for the Gareth Edwards directed reboot of Godzilla. A lot of other movie sites seem to believe that this is our first real look at the creature, but I'm not fully convinced. I think they just used that image to slap on a licensing poster, but I don't think it's the real thing.
Back at San Diego Comic-Con an up-close image of a face of Godzilla leaked out which you can see here. This looks like a similar design. The thing is... we were told that Godzilla design was not the final design for the actual film. I think this is just another temporary placeholder design to help get people excited, but I guess we'll have to wait and see.