'Avengers' sequel planned for May 2015

In this file photo released by Disney, Samuel L. Jackson portrays Nick Fury in a scene from Marvel's "The Avengers". Disney and its Marvel Studios unit announced Thursday, Aug 16, 2012 that the follow-up to this year's biggest hit, "The Avengers," will arrive in theaters on May 1, 2015.[Photo/Agencies]

"The Avengers" are returning for a superhero sequel three years from now.

Disney and its Marvel Studios unit announced Thursday that the follow-up to this year's biggest hit will arrive in theaters on May 1, 2015.

The studio announced last week that Joss Whedon will be back to write and direct the as-yet-untitled sequel.

Released in May, "The Avengers" gathered such Marvel comic-book heroes as Iron Man (Robert Downey Jr.), Captain America (Chris Evans), the Hulk (Mark Ruffalo) and Thor (Chris Hemsworth). The film has taken in nearly $1.5 billion worldwide.

There will be plenty of Marvel action building up to "The Avengers" follow-up. Downey's "Iron Man 3" is due out next May, followed by Hemsworth's "Thor" sequel in November 2013 and Evans' "Captain America" sequel in April 2014.