On Instagram, the director posted a photo showing the first page of the script for the next "X-Men" movie.
The post reaffirms Bryan Singer's participation in the project in spite of his being the object of sexual abuse accusations. Previously, rumors suggested that he would be replaced in the director's chair for the next feature in the franchise.
In the snapshot revealed by Singer, the first page of the script refers to a battle on the Nile including the presence of the Four Horsemen of the Apocalypse.
Last week on Twitter, the filmmaker posted a photo of himself at work on the script with screenwriters Simon Kinberg, Michael Dougherty and Dan Harris.
"X-Men: Apocalypse" will introduce the villain of the same name, who appears in the X-Men universe through a temporal paradox. Time travel was the recurring theme in the latest film in the franchise, "X-Men: Days of Future Past." Apocalypse is an immortal Egyptian mutant aged over three millennia. Fans who stayed in the theater through the credits of the last film caught a glimpse of him building a pyramid, flanked by four men on horseback, likely the Four Horsemen of the Apocalypse.
In the new film, Channing Tatum is expected to take on the role of Gambit, a mutant played in "X-Men Origins: Wolverine" by Taylor Kitsch.
The first-generation X-Men will be back for the sequel, as indicated by the ending of "X-Men: Days of Future Past." For the time being, only James McAvoy and Michael Fassbender have confirmed that they will return to their roles as Professor Xavier and Magneto.
"X-Men: Days of Future Past" is the biggest box-office success of 2014 so far, with $712.7 million in total worldwide revenues since its release.
"X-Men: Apocalypse" will arrive in US theaters on May 27, 2016.