He will join Dan DiDio to pen his first work for DC Comics since the 2011 New 52 relaunch.
Veteran writer Jim Starlin has also teased an upcoming project that will be his first for the publisher since it restarted its entire line.
"Think I mentioned this somewhere but JM DeMatteis will be joining me on the scripting of the series," DiDio wrote on his Facebook page.
"It will help keep the series on schedule and with JM, deliver the quality you hope and expect for the book."
Starlin also took to Facebook to reveal that he is working on an unnamed series.
"I have just completed scripting the first two issues of an ongoing series for DC Comics," he wrote.
"Can't say what the title is until DC wants the news out. But I imagine a lot of people will be quite surprised to see me take over the writing chores on this particular property. Been having a (surprisingly) fun time with it so far."
Starlin recently met with Marvel Studios following his criticism of its use of his creation Thanos - a meeting he reportedly came away satisfied from.
DeMatteis was part of a pitch put together with Keith Giffen and Kevin Maguire for a rejected New Gods project at DC.
DeMatteis first issue will be Phantom Strange #6, which will debut on March 6.