What monster is this?

Seriously in TV spot 7 skip to 0:19 what is that? Link:http://www.youtube.com/watch?v=2x5G8LxmMUs. It looks like something coming out of the sea clearly and is centipede like. I think he 2012 Comic Con concept monster actually made it into the movie... and we see it in this TV spot. Link:http://www.youtube.com/watch?v=tXOqJ7jW0j4. Skip to 0:45 it looks like a trail to the sea that the Comic Con monster would have made with all the lines in the trail from its feet. Probably in the TV spot is it emerging from the sea. Just a reminder of what that monster looked like:http://www.godzilla-movies.com/community/forums/topic/30098. What do you guys think?

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