The Batman/Swamp Thing team-up story originally scheduled for release in January will see the light of day as May's "Batman" #23, as announced by artist Mitch Gerads on Saturday afternoon during the "DC Comics: Essential" panel at Emerald City Comicon in Seattle.

The story, described by Gerads as a "murder mystery" during the panel, was first solicited as January's "Batman" #15, a reunion between Gerads and "Batman" series writer Tom King, who worked together on the acclaimed Vertigo series "Sheriff of Babylon." Subsequently, DC resolicited both "Batman" #14 (initially slated to be illustrated by Stephanie Hans) and "Batman" #15, as a two-part Batman/Catwoman story titled "Rooftops," also drawn by Gerads.

RELATED: DC Teases Second Season of Sheriff of Babylon, Possible Title Change

Here's the original solicitation for King and Gerads' Batman/Swamp Thing story: "STREETS AND SWAMPS"! Swamp Thing comes to Gotham City with a mysterious request for Batman—but these longtime allies will have to make up for lost time and work together in order to confront a growing threat that only they can stop!"

"Batman" #23 was solicited in February as an epilogue to the current Bane story arc, with art from David Finch and Danny Miki, and a release date of May 17. It's not yet known if this change will alter the release date of the issue.

A second "season" of "Sheriff of Babylon" is also on the way from DC/Vertigo, and was teased back the publisher in November.

Keep reading CBR for the latest from Emerald City Comicon 2017.