New Delhi, Aug. 15 -- Marvel Studios has released a new trailer for Avengers: Doomsday, offering its darkest look yet at Robert Downey Jr's Doctor Doom and revealing the scale of the threat facing the Marvel Cinematic Universe.

Shown during Disney's D23 fan event, the footage centres on Victor von Doom and suggests that personal tragedy has helped drive his transformation into one of the MCU's most formidable villains. The trailer features a tearful Sue Storm reflecting on what Victor has become, describing him as "broken."

Doom's apparent revenge is set against images of a devastated city and a group of heroes who appear increasingly helpless. Among those shown are Magneto, Gambit, Steve Rogers and other returning characters, while Ree...