Debut 'Age of Ultron' trailer dated for October 28

The first trailer for 2015's "Avengers: Age of Ultron" will premiere during a break on October 28's TV episode of spin-off serial "Agents of SHIELD," with theatrical and online versions expected to follow soon after.

Joss Whedon's second ensemble film for the Marvel Cinematic Universe is to pull in repeat appearances from a number of core characters, including Iron Man (Robert Downey Jr.), Captain America (Chris Evans), Thor (Chris Hemsworth) and Nick Fury (Samuel L. Jackson).

In addition, several new faces to the franchise arrive including James Spader's malevolent AI Ultron, Elizabeth Olsen as Scarlet Witch, and Aaron Taylor-Johnson as her twin brother Quicksilver.

The film, due from May 1, 2015, is to conclude Marvel's second phase of cinematic outings, a relatively quick arc that began in May 2013 with "Iron Man 3" and went on to encompass "Thor: The Dark World," "Captain America: The Winter Soldier" and the largely unrelated "Guardians of the Galaxy."

Next up after that will be "Ant-Man" in July 2015, starring Paul Rudd ("This is 40") and directed by Peyton Reed ("The Break-Up"), with titles beyond that including a third "Captain America" (May 2016), "Doctor Strange" (July 2016) and a "Guardians of the Galaxy" sequel (July 2017).