In October 2014, Marvel announced a two-part sequel to Age of Ultron, titled Avengers: Infinity War. Part 1 was scheduled to be released on May 4, 2018, with Part 2 scheduled for May 3, 2019. In April 2015, Marvel announced that Anthony and Joe Russo would direct both parts of Avengers: Infinity War, with back-to-back filming expected to begin in 2016. Also in the month, Kevin Feige said the films were titled as two parts of a single film "because they [have] such shared elements", but he would not actually describe them as "one story that's cut in half. I would say it's going to be two distinct movies. " By May 2015, Christopher Markus and Stephen McFeely signed on to write the screenplays for both parts of the film. The following May, the Russos revealed that they would be retitling the two films, to further remove the misconception that the films were one large film split in two, with Joe stating, "The intention is we will change [the titles], we just haven't come up with [them] yet. " In July 2016, Marvel removed the film's title, simply referring to it as Untitled Avengers film. Feige and the Russo brothers indicated the title was being withheld because it would give away plot details for this film and Infinity War.