After the Battle of New York, the Avengers find themselves investigating strange portals appearing in a small town in California. When they drop by, they'll find that the weirdness of Earth is not confined to Loki,HYDRA or aliens from beyond the stars...

A crossover with Trollhunters, by Guillermo del Toro.

Trollhunters is owned by Dreamworks and the MCU by the Disney Corporation. All characters are the property of their IP holder and no challenge is implied.