Goyer teased the mysterious 13-issue story that will mark his return to comics at New York Comic Con.
"There are some plans," he told Comic Book Resources. "I have plans to do something with Geoff Johns that's been on the drawing books for a while.
"Basically, [we're] just looking for the time to plot it out. DC is holding the space for it, it's an event that we're going to do, it's a 13-issue thing. Hopefully, we'll start plotting it out this fall."
Goyer and Johns previously collaborated on JSA for almost 50 issues before Johns went solo on the book.
Nothing has been revealed about the event so far.
DC is planning 'Trinity War', its first line-wide crossover since 2011's New 52 relaunch, for 2013.