Are we 100% sure this isn't just a place-holder for a

"At the Mountains of Madness" game?

Del Toro is directing a movie adaptation of this horror-filled book by HP Lovecraft, and judging by this short glimpse, it sure seems to be along those same lines. It would definitely explain the insane tentacles.

The movie is supposed to be a work of abject terror. And judging by his comments about movie games right before the announcement, perhaps this movie game will be made with an equal amount of love alongside the film's production.