It was announced earlier this month that the conclusion to Brightest Day would see the
two characters rejoin the DC Universe, leading
into a three-issue miniseries called
Brightest Day Aftermath: The Search for Swamp Thing.
Vankin has now teased that although Constantine and Swamp Thing traditionally have a relatively friendly relationship, circumstances have changed and Constantine is now desperate to find the plant elemental.
"Clearly, something has changed. John needs to find out what that something is," Vankin explained to Comic Book Resources. "The story of Search for Swamp Thing starts when Constantine realises that something is very different in the world, something he can't quite put his finger on.
"If there is one thing that doesn't sit well with John, it's the feeling that he's been outsmarted, especially by the Swamp Thing whom John always considered to be not the sharpest thorn on the rose."
As well as dealing with the Constantine's relationship with the Swamp Thing, Vankin's miniseries will also set up some of the chain-smoking magician's relationships with other DC Universe characters, including Batman and Superman.
Brightest Day Aftermath: The Search for Swamp Thing #1 launches on June 2.