The creator will leave DC Comics' New 52 title to return as artist on a Green Lantern project, according to Firestorm Fan.
Van Sciver has worked on Firestorm since September 2011, first writing with Gail Simone and later with Joe Harris following the Batgirl writer's departure.
"Hey guys! Just thought should drop a line to let you know that I'm moving on from Fury of Firestorm to draw some Green Lantern and finish this [original graphic novel] that I've been working on," Van Sciver wrote on his Facebook page.
"I've helped plot the book's course into the future with Joe Harris, but I want to narrow my focus now. And believe me, he and Yildiray Cinar have got the ball. Thanks to everyone who's supporting the book!"
Van Sciver illustrated Geoff Johns's Green Lantern: Rebirth and the early issues of the 2005 relaunched ongoing series, which saw the return of Hal Jordan to the role of Sector 2814's protector.
He also collaborated with Johns on Flash: Rebirth.