This mode would be a co-op mode that would pit players against some of the (literally) larger threats of the Marvel IP, with players trying to defeat the boss before the timer runs out. Some bosses that could be included could be Fin Fang Foom, Surtur, and a Frost Beas. Perhaps even Eson the Searcher and Galactus, although those two seem like a bit much. I feel this mode would be a great way to bring in some characters that would be too big to be a playable character, while still giving them plenty of time in the spotlight.