Oscar-winner Robert Downey Jr. announced his return to the Marvel superhero films during a blockbuster Disney presentation at Comic-Con on Saturday, as the company attempts to reinvigorate its all-time record-grossing movie franchise, reports Daily Sun.

Harrison Ford and Pedro Pascal were also officially unveiled among a batch of new stars joining the movie franchise, which has grossed an unprecedented $30 billion at the box office, but in recent years has suffered a number of high-profile flops.

The actor, who launched the entire Marvel movie universe with 2008's "Iron Man," will return as a totally different character -- Doctor Doom, a prominent villain in the Marvel comic books -- it was revealed.

He appeared anonymously on stage among a group of hooded and masked figures, before stepping forward and revealing his much-rumored return.

"New mask. Same task. What'd I tell you? I like playing complicated characters," said Downey Jr., to the delight of the assembled Marvel obsessives.

Downey Jr. won an Oscar this year for his role in Christopher Nolan's "Oppenheimer," and had seemingly retired from the Marvel films in 2019.

- 'Doomsday' –

The presentation was the hottest ticket of the four-day pop culture extravaganza, with fans lining up for hours to get a coveted seat.

Marvel fans have complained in recent years about over-complicated plotlines and the departure of beloved characters, including Downey Jr's Iron Man, with some calling for a wholesale reboot of the movies.

The franchise was also rocked by domestic violence revelations about actor Jonathan Majors, who had been set to become the major new supervillain across multiple films.

Majors, who was convicted for assaulting and harassing his then-girlfriend, was dropped by Marvel.

The answer to who will fill that role was seemingly answered by Downey Jr.'s return as a villain.

Joe and Anthony Russo -- the brothers who previously oversaw 2019's "Avengers: Endgame," which briefly became the highest-grossing film of all time at more than $2.79 billion -- will also return.

They will direct "Avengers: Doomsday," in May 2026, and "Avengers: Secret Wars" in May 2027.

Bd-pratidin English/Tanvir Raihan