Hopefully the failure of The Flash won't slow down DCU properties in development like the MAX Lanterns series, but I suspect it will. DC's already had one unsuccessful attempt to get the world of Green Lantern into live action so they really have to get it right when they try again. Announcements on that show have gone quite, however. I'm thinking that James Gunn probably wants to make sure that Superman: Legacy is as good as it can be before concentration on expanding the universe outward from there, which is as it should be.