>>124897151He probably thought Green Lantern was such a 5th rate nothing of a franchise that no one would care if half the background cast were killed off. Which is a decision DC has made before.
At least they did not go full Marz with it and fully remove all other GLS in favor of Jo and Teen Lantern being the only ones existing at all for the next 100 or so issues. But that might still happen since there is still no explanation for why all rings died and somehow no one can just rebuild the central battery in the span of a year.