SEOUL (The Korea Herald/ANN) - Canadian cinematographer Trent Opaloch, a key figure behind the Captain America film franchise, may have unknowingly revealed the title of the next instalment as his filmography on his website included Avengers: End Game, according to a US media outlet.

After Omega Underground, which specialises in film, reported the revelation, Opaloch changed the title into a working title, Avengers 4.

Opaloch had worked as a cinematographer for Captain America: The Winter Soldier, Captain America: Civil War and Avengers: Infinity War.

Some fans have assumed that the fourth instalment will be titled Avengers: End Game, citing the last line in the most recent edition of the franchise, Avengers: Infinity War. However, the film's directors, the Russo Brothers, denied such speculation, saying: "None of the theories have correctly guessed the title of Avengers 4."

No statement about the newly leaked title has been released from the Russo Brothers yet.

Avengers 4 is set to shoot in New York and Atlanta from this summer and release next year.