Josh Keaton, the voice of the main protagonist: Hal Jordan on the "Green Lantern" animated show spoke to IGN recently and had this to say..............
Keaton said, “From what I’ve heard the performance of the [Green Lantern] movie made it so there was a lot of movie toys still in stores. And so the stores didn’t necessarily differentiate between one being movie toys and others being animated series toys. They just said, ‘Green Lantern? We already have those.’ And so because of that, a toyline wasn’t even made. And because a toyline wasn’t made, we really didn’t have the funding to go on in that sense, because a lot of funding is tied to that. So it’s unfortunate. It wasn’t because the fans didn’t like it. It wasn’t because of the ratings. It really, at that point, came down to the merchandise, and we had a lot to overcome from the performance of the film and that’s where it was.”
Don't blame the new shows
Don't blame Cartoon Network
Blame Ryan Reynolds :D