John's not my favorite Lantern (Kyle is adorable and geeky and a cartoonist like me!) but he is definitely the one I'd want on the Justice League. I don't think DC realizes how many people think of him as the definitive Green Lantern, thanks to the DCAU. Pretty much anyone who grew up watching the Justice League or even caught a few episodes once or whatever think John Stewart when they hear Green Lantern, with Kyle coming in at a distant second. The DCAU-only fans are just a huge potential market largely being ignored, and that needs to change.