This is a fan art based on the multi-legged kaiju carcass seen in the leaked Godzilla 2014 teaser trailer. That creature has often been described as a giant centipede, while some say it more closely resembles a giant isopod or sea louse. This is one fan's take on the monster. Personally, I think the head would be bigger and more defined
It is known for sure that one of Godzilla's kaiju opponents is/are named Muto, which means "transformation". This conformation comes from a Godzilla 2014 pre-sale toy that describes it as an 8-legged kaiju. This is the same monster described from the 2013 Comic-con teaser trailer not released or leaked to the general public. A sketch of the monster was made by an attendee and posted online and can be seen on this website or in my gallery. The creature depicted above may or may not share the same name. It's unknown what relationship if any exists between the "Centipede" kaiju and the "spider" Muto kaiju.
Soon however, we can expect the official trailer to be released by Legendary pictures on November 3th, the 59th anniversary of the original "Gojira" in 1954. November 3rd in Japan is a national holiday, Culture day and also known as Godzilla Day.
Godzilla comes out in theaters, May 16, 2014.