In order to save the Marvel Universe from complete destruction, Namor the Sub-Mariner joined forces with Thanos in a Marvel Comics team-up that the MCU shouldn't ignore. After departing the Illuminati after stopping a potential incursion against the wishes of his fellow heroes, Namor decided to form the Cabal, teaming up with Thanos to destroy any possible world that could collide with his universe. The Cabal ended up being one of the deadliest teams of villains ever assembled.