The music is "Existence" by Audiomachine.

My Marvel Studios tribute to this grand arc of storytelling they're undertaking: the Infinity Gauntlet and Infinity War. Thanos has many stones to acquire in phase 3, after first being denied the Tesseract by The Avengers and then the Power Stone by the Guardians of the Galaxy.

Get ready for Dr. Strange as the next major chapter in the Infinity saga! Likely Thor: Ragnarok as well! Excited?
Avengers-Infinity War 'Power of the Gods' saga trailer [FAN MADE]_low
The Avengers (Award-Winning Work), Avengers (Organization In Fiction), Trailer (Award Discipline), Science Fiction Movies, Marvel Comics (Production Company)...