So far 18 Marvel Cinematic Universe (MCU) films have been released over the last 10 years and the series is in no way slowing down, with many more movies already in the pipeline.

Downey Jr, 53, added that Avengers: Infinity War could well be the biggest superhero film yet.

At a press conference at Marina Bay Sands, also attended by Doctor Strange actor Benedict Cumberbatch and actress Karen Gillan, who plays Nebula in the Guardians of the Galaxy films, Downey Jr said: “I read in some magazine that the No 1 fan-voted moment was the airport fight in [2016’s] Captain America: Civil War because there are so many superheroes at once.”

The popular American actor added: “But people don’t want a repeat of what’s worked well.

“The challenge this time was how do we expand something without repeating something that has been executed well before.

“It’s the antiprocess, if you will. Because usually, if something works, you just keep doing that.”

Avengers: Infinity War will feature even more superheroes, such as Doctor Strange, Nebula and the Guardians of the Galaxy, fighting together on the side of good against the forces of evil.

When asked about working with the new characters in the film, Downey Jr said that this was the best opportunity ever to work with more superheroes from the Marvel family.

“I wholeheartedly welcome these other Marvel superheroes into The Avengers team,” he said.

“This is the best chance to work and act together with great people in order to bring the Avengers story to greater heights,” he added at the event, which was also attended by co-director Joe Russo and executive producer Trinh Tran.

Avengers: Infinity War which is the sequel to Marvel’s The Avengers (2012) and Avengers: Age Of Ultron (2015), will be screened in cinemas worldwide from April 25.

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