Can't believe I missed that connection! This monster has a great deal in common with Cthulhu . . . a menacing monstrous god that devours everything for no apparent reason, lurking at the bottom of the sea and waiting to be released. One of the videos you linked to suggests that some sort of underwater seismic activity is what caused his release, possibly related to drilling by the Japanese company, Traguato.
Like Abrams' "Lost" TV show, much of the detail is not on the screen, but hidden in the viral marketing campaign. He's very good at this aspect of creating his stories.