Since late May 2016, the DC Comics universe has undergone what the company is calling a rebirth. It began with Geoff Johns‘ DC Universe: Rebirth No. 1, an 80-page book that introduced the integration of DC’s mainstream heroes with the Watchmen.

Nearly 11 months later, those heroes are about to officially meet. In a Twitter post by writer Tom King, the author revealed the cover to April’s Batman No. 21. On it, the Comedian’s iconic blood-stained button is plastered all over screens in the Batcave.

Accompanied with the tweet is the quote, “None of you understand. I’m not locked up in here with you. You’re locked up in here with me.” That’s the infamous quote spoken by the Watchmen’s Rorschach when he is imprisoned.

Batman No. 21 will be the start of a four-part arc that will span two issues of Batman, written by King, and two issues of The Flash, written by Joshua Williamson.

“It’s, of course, enormous fun, but it’s also, I have to say, quite frustrating,” Titans writer Dan Abnett said in an interview with ComicBook.com. “It’s a shared concept. It’s not mine to play with. It’s something that Geoff set up and obviously is a major event that’s coming this year, I believe, and, therefore, it’s a privilege to be able to write the book and the character Wally [West], who is so close to the heart of all that.”

Titans is an arc that follows another Flash, West, who is initially erased by a being outside of time and space. He later returns to the world and finds his old teammates when he breaks free of the Speed Force.

Batman No. 21 will go on sale on April 19. Standard issues of the four-part series will sell for $2.99 while lenticular covers will sell for $3.99. The cover art is done by Jason Fabok.

This story was first reported by ComicBook.com’s Russ Burlingame.