<P> In March 2012, American alternative rock band Soundgarden announced through its Facebook page that its song "Live to Rise" would be included on the film's soundtrack . Additionally, the Indian rock band Agnee released a music video for its single "Hello Andheron", which serves as the theme song for the film's Indian release . Hollywood Records released the soundtrack concept album inspired by the film, Avengers Assemble, on May 1, 2012, the same day as the score . </P> <P> The film was promoted at the 2010 San Diego Comic - Con International, during which a teaser trailer narrated by Samuel L. Jackson was shown followed by an introduction of the cast . In June 2011, Marvel Studios announced that it would not hold a panel at the 2011 San Diego Comic - Con International after studio executives decided it was not prepared to compete with its own past and fan expectations with filming still in production . In July 2011, a teaser trailer that was meant to be the post-credits scene of Captain America: The First Avenger was briefly leaked online . Entertainment Weekly speculated it came from a preview screening and described the footage as "shaky, fuzzy, flickering and obviously filmed on a cell phone". </P> <P> In August 2011, Walt Disney Pictures, Pixar Animation Studios and Marvel Studios presented a look at Walt Disney Studios' upcoming film slate, which included The Avengers, at the D23 Expo in Anaheim, California . The presentation featured footage from the film and appearances by the cast members . Later in August, Disney dismissed Marvel's executive vice president of worldwide marketing, vice president of worldwide marketing and manager of worldwide marketing to bring their functions in - house . </P> <P> In October 2011, Marvel Studios held a presentation at the New York Comic Con that featured new footage and a panel discussion including producer Kevin Feige and several cast members . The first full - length trailer was also released in October . Comic Book Resources said, "The two - minute teaser handily establishes the movie's premise" and is "heavy on the assembling, but fans are also treated to plenty of action, as well glimpses (sic) of Iron Man's new armor and, best of all, the new take on the Incredible Hulk . Naturally, Robert Downey Jr.'s Tony Stark gets the best lines". However, The Hollywood Reporter called it, "Awesome . Or it would be if we hadn't seen all of this before and expected every single thing that we saw in the trailer". The trailer, which debuted exclusively on iTunes Movie Trailers, was downloaded over 10 million times in its first 24 hours, breaking the website's record for the most - viewed trailer . This record was surpassed by the trailer for The Dark Knight Rises, which was downloaded more than 12.5 million times in its first 24 hours . The trailer received 20.4 million views in the 24 hours after it debuted . A second full - length trailer was released on iTunes in February 2012, reaching a record 13.7 million downloads in 24 hours . The theatrical trailers of The Avengers appeared with many films, including Mission: Impossible--Ghost Protocol, 21 Jump Street and The Hunger Games . </P>

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