Disney had previously said the film would be spread over two instalments
Avengers: Infinity will only be one movie, not the two that had been previously announced.
Disney had confirmed that the film would be spread over two instalments, but filmmakers have now changed their plans.
The movie will still be released as planned on May 4, 2018, but the second part of the story has now been renamed to Untitled Avengers. The latter film is still scheduled for release on May 3, 2019, however.
The films are being directed by Anthony and Joe Russo and were announced in October 2014. Earlier this year, the Russo brothers said the third and fourth Avengers films were being renamed, partially to make clear that they were two separate stories.
Avengers: Infinity War is due to begin filming later this year, Variety reports.
Robert Downey Jr and Jeremy Renner, cast members from the first two Avengers films, have been confirmed to return for Infinity Wars.