But Abnett and Lanning are about to get it anyway. More a suggestion, really, for a story. So here's the idea:
Nova doesn't want to share the Nova Force.
When the idea first occurred to me, I thought it was really bad. It sounded like a story of someone addicted to power, and unwilling to recognize that it could possibly be put to better use if distributed amongst other individuals. Besides, Marvel did that once, with an individual called Super-Nova, who took all the Nova force, and caused mass havoc, though he didn't try to erase all existence that I know of, so Parallax can still claim that as his own. It's not a totally unsalvageable story, since it could be written such that Nova is keeping all the Nova Force because it lets him handle problems that would require squads of your average Novas to deal with, rather than out of a desire for ultimate power, but it would still raise the question of why he wouldn't want to get those squads set up, where the Nova Force can help people in more than one location at once.
It was thinking about it from that angle, that lead me to this explanation, where we learn Richard Rider doesn't want to rebuild the Nova Corps because he doesn't want to watch anymore good people die. The last time the Nova Corps actually existed, it got wiped out, and Richard was too weak to do anything but avenge them. Those Novas were veterans, beings who by and large looked at Rich as just a Terran rookie they'd have to look out for. The Annihilation Wave may not be as numerous or organized as it was then, but the universe is still going to be plenty dangerous for any of the rookies that would end up being recruited. [Aside: How do Novas get selected? Green Lanterns get chosen on their ability to overcome fear, what's the criteria to become a Nova, and how do you find people matching it?] Could Nova go through the pain of finding these new members, only to watch them get killed because they aren't ready for what's out there? By sharing the Nova Force with others, Rich weakens himself, which cuts into his ability to traverse distances, and would make it harder for him to keep a watchful eye on the rookies.
So I think it could be kind of interesting to show Rich as unwilling to rebuild the Corps, as saying that things are too chaotic to take the time for that, and then delve into the reasons why he's doing that.
One more thing. Buy Nova. Please.