The mercurial villain Loki resumes his role as the God of Mischief in a new series that takes place after the events of “Avengers: Endgame.”The mercurial villain Loki resumes his role as the God of Mischief in a new series that takes place after the events of “Avengers: Endgame.”The mercurial villain Loki resumes his role as the God of Mischief in a new series that takes place after the events of “Avengers: Endgame.”