On Monday, “X-Men” director Bryan Singer took to Instagram to post a teaser for “X-Men Apocalypse,” the next installment in the franchise.

With “X-Men: Days of Future Past” still surging through the box office, already grossing more than $712 million, Singer is wasting no time getting fans excited for the follow-up.

The director’s Instagram post featured what appears to be the partial first page from the “Apocalypse” script:

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While the photo offers few plot details, it contains a mention of the Four Horsemen characters. In the comics, the Horsemen are mutants who either volunteer or are brainwashed by the villain Apocalypse to do his evil bidding. Each of these characters takes the name of one of the biblical four horsemen of the apocalypse: Death, War, Famine and Pestilence.

Fans of the comics will note that one of Apocalypse’s Horsemen is the mutant Angel, played onscreen by Ben Foster in “X-Men: Last Stand.” There’s no word yet on whether or not Foster will reprise the role in “X-Men Apocalypse.”

Screen Crush notes that the Horsemen were teased in the “Days of Future Past” end-credit scene, which showed Apocalypse in his younger days in Egypt, accompanied by four hooded figures on horseback.

“X-Men: Apocalypse” is scheduled for a 2016 release.