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The film, which both production houses hope will kickstart a new franchise, is based around lesser-known superheroes who have to take on human and superhuman threats whilst fighting their own personal battles.

The film is a return to familiar form for the ever-expanding superhero franchise.

"Florence combines relatability with talent and star power, and she appeals to a wide variety of audiences thanks to balancing superhero movies and sci-fi with thoughtful dramas," Ms Smith said.

The "underwear" is worn outside the clothes, like a superhero costume.

Inspired by the superhero Iron Man, who has an AI assistant known as J.A.R.V.I.S.,