The publisher has teased a series of big changes to arrive in that month.
It shared some hints with BuzzFeed about the future of characters including Booster Gold, Pandora and the New Gods.
"Booster Gold reappears while an entire team disappears," said DC. "One team is trapped in a bottle while another is changed completely. Some heroes change their colours and other change allegiances.
"Pandora battles to the death. A close encounter of The Dark Knight kind. There's a new, old Creeper and some old New Gods. One hero quits, and another hero dies."
April will feature gatefold covers on all its titles, many of which promise to reveal something about the issue when opened out.