So they didn't have the budget for what fans wanted which is, objectively, Guy Gardener Alan Scott and the sub plot of Soranik and Sinestro. So instead we get to see the green lantern that all 3 of these characters dislike and that has next to no interesting side character plots within green lantern corps. I can see it now, they probably warned them saying "if you can't deliver xyz with your GLC plot then we reserve the right to go with another cookie cutter green lantern story". Like for fucks sake the GLC plot was the only thing that could branch DC into cosmic DC and they just don't get it.