I have a vague memory of having recently seen - I think maybe even on this board - some claim that plans had changed and it would become an ongoing. But I can't find any clear indication of that with a quick online search. I just read this interview with him and Liam Sharp in which the interviewer says at the end that they're "halfway through" their run, which given that they're talking about issue 8, would seem to indicate a 16-issue run (MATH! I KNOWS IT!). But maybe he's using the word in a looser sense, as people sometimes do conversationally.
https://www.syfy.com/syfywire/green-...ar-on-the-book
I ask because I just finished #8, and holy cow, was that deliciously nutty fun. Loving this book and would love for it to go on for quite a while. And I'd barely ever read any GL before - I binged the first Geoff Johns omnibus to brush up on background when I heard Morrison would be writing the character.