Who Is the Kaiju in the Mountain in Trailer 2?

One of the main things that caught my attention in the second KOTM trailer right off was the 2nd new Titan, the mysterious moving mountain. A lot of people jumped on Anguirus immediately, but I always take 'inside info' with a can of salt. Some say Baragon, others that mountain Kaiju from the Monsterverse comic. It wasn't til I listened to the trailer with a good pair of headphones that I heard the ambient background noise of the scene: the monster's roar. Certainly a familiar sound! It is lower-pitched, and guttural but nonetheless unmistakably Anguirus-esque.  You can also see the horn on his head, and just as it cuts to the next clip, the horn on his nose. If I wasn't excited before (I was) I sure am now! the sound is at the 0:56-0:57 mark. Tell me what you think!