When a call from their dad brings the Winchester brothers to England, Sherlock and John Watson are introduced to the world of the supernatural. However, Sherlock is forced to enlist Sam and Dean's help again when John is kidnapped - but is this just an average kidnapping, or is this an Avenger-level threat that the brothers and the detective are getting involved in?

A selection of universes collide with each other. Will the masses of heroes be able to work together well enough to defeat all of the villains? Includes characters from: MCU (including from other universes within the franchise) DCEU The Umbrella Academy