SPOILER ALERT: If you have not read JUSTICE LEAGUE DARK #19 yet and do not wish to know what happens, stop reading this post now (major spoilers ahead!).

This summer, the highly-anticipated “Trinity War” crossover event will pit the Justice League, Justice League of America, and Justice League dark in an epic showdown that will have monumental effects on the entire DC Universe.

This week, JUSTICE LEAGUE DARK #19 hit stores and kicked off “House of Misery,” the final story arc for the series before it heads into “Trinity War.” Guest-starring both The Flash and Swamp Thing, JUSTICE LEAGUE DARK #19 ended with the New 52 debut of a major villain: Doctor Destiny!

“Basically, it’s a new villain for The New 52, but is actually an old face for Justice League fans," JUSTICE LEAGUE DARK co-writer Ray Fawkes recently teased to MTV GEEK about Doctor Destiny entering the series. "He’s going to be a really big problem. In many ways, he’s their nightmare come true. So they’re going to be psychically handling being changed so radically. For instance, Madame Xanadu aging so fast, then coming back to her youth; she’ll be grappling with that at the same time this insane new threat surfaces ... I think readers will be really excited when we have the reveal of the villain in this arc at the end of the issue. It is going to blow some minds, and they’re going to be really into it. It is a really exciting reveal … I think readers will want to take a look at this because Mikel Janin has pulled out all the stops. This will be packed full of wild stuff and it’s like nothing else being put out right now.”

Above, take a look at the final page of “House of Misery, Part One” as Doctor Destiny reveals himself to Swamp Thing in the House of Mystery. And in the comments section below, sound off on what impact you think Doctor Destiny will have on the members of the Justice League Dark during this time of great turmoil!

JUSTICE LEAGUE DARK #19, written by Jeff Lemire and Ray Fawkes and illustrated by Mikel Janin and Vicente Cifuentes, is available in stores now.