He's actually not that big--just 110 meters tall, so that poster is really just a way to show Godzilla in the city. Even the new trailer shows that he's not bigger than some of the buildings he's toppling.
In many ways, this is the first actual trailer. The thing we saw before was a teaser, and I don't know if any historical revisionism is going on. Recall that the leaked Comi-Con teaser (with the Oppenheimer quote) was basically proof of concept. It probably had nothing to do with the final film. The thing I love about this new trailer is that it's taking Godzilla's origin and turning it on its head a bit, and Ken Watanabe's scenes imply something else is going on, too.
I want that image of Godzilla just laying in the water as a desktop background.
ALSO, just so you all know, that's not New York, it's Las Vegas. This implies that Godzilla tears through San Francisco without much trouble and heads straight for Sin City. Stogi, it's three months away (May 16th). Just watch it. On a big TV, with the sound up, and the lights out. And grab some lube.