Warner Bros. has reserved the dates for four new film projects between now and 2020, including two - possibly three - DC films, according to the Wrap.
The studio has reportedly reserved February 14, 2020 an June 5, 2020 for as-yet-unspecified DC Films projects. There are several DC films without firm release dates, including Matt Reeves' The Batman, as well as the planned The Flash, Nightwing, Batgirl, Gotham City Sirens, Wonder Woman 2, Man of Steel 2, and Suicide Squad 2.
A "WB Animation" movie is reportedly scheduled fo June 1, 2018. While for comic book fans that might seem like a shoe-in for a DC-related project, that animation studio has several other non-DC projects in the works including Space Jam 2, The Billion Brick Race, and the Bone adaptation.
The fourth reservation is December 13, 2019, for an "Untitled WB event film."