Marvel was plotting to lure more audience to tune in to its spin-off series "Agents of S.H.I.E.L.D." by releasing the new teaser trailer  for "Avengers: Age of Ultron" during the show's Oct. 28 episode. However, to Marvel's surprise, the trailer was leaked online, which had fans feasting on it earlier than expected.

On Oct. 23, Marvel took to its Twitter account and jokingly blamed Hydra for the leak.  The fictional organization, it seems, was expressng its rebellious nature.  The trailer has since then been released by the company.

The trailer has so far gained positive reception and it effectively makes fans all the more eager to see the epic installment.  As such, Marvel will give another set of teasers for the fans on Oct. 28.

The company recently announced that it will release footages not shown in the trailer. Expectedly, speculations suggest that the clips may contain the scenes where Tony Stark wakes up to see the Avengers disbanded and floating in outer space, as this was reportedly one of the teasers Marvel showed during the 2014 Comic-Con.

As a bonus, ABC will also air "Marvel 75 Years: From Pulp to Pop!" on Nov. 4 to reveal more of the grandest superhero get-together set to be shown in May 2015. Fans need to tune in by 9 p.m. ET on ABC to witness what Marvel is talking about.

"Avengers: Age of Ultron" will mark the big time encore assembly of Iron Man (Robert Downey Jr.), Captain America (Chris Evans), Thor (Chris Hemsworth), The Hulk (Mark Ruffalo), Black Widow (Scarlett Johansson) and Hawkeye (Jeremy Renner), with aid from Nick Fury (Samuel L. Jackson) and Agent Maria Hill (Cobie Smulders) as a new powerful enemy known as Ultron (James Spader) is on the loose.

It will also star Elizabeth Olsen as Wanda Maximoff, Aaron Taylor-Johnson as Pietro Maximof and Paul Bettany to give life to a new Vision.

"Avengers: Age of Ultron" will hit the big screen on May 1, 2015.