Like any Monster Hunter-style co-op game, Lord of Apocalypse has grand-looking Guardians, boss-style monsters. A new trailer for the game introduces some of these in a “Boss of Apocalypse” video. Cthulhu is in here, too:
After you defeat a Guardian, you can summon them as an ally. So yes, while Cthulhu looks pretty terrifying, he’ll make for a fine pet once you’ve taught him some manners.