DC, well, I don't know if they're doing anything themselves or still selling rights only. At this point, they're still not going after what marvel wanted which was more or less accurate to the comics tellings and consistency between movies and trying to get the movies right. Their response is 'The avengers just made 5 quadrillion bucks, we need to get JL out there ASAP so we can cash in'.
Marvel took over their franchises to get it right and set out a long term far reaching plan. DC's plan is cash in, or so it seems. Plus they seem to be pushing the 52 stuff which, from what i've heard, no one really is into.