Yeah, even though I think someone like Lindelof may have had relatively free rein to do what he wanted with Lanterns, I can't see Gunn not micromanaging Batman if he doesn't end up directing it himself (I still think that's a possibility...).
I also continue to believe that the DCU may not be so much an extended universe as many assume, as the addition of a "Gunn DC saga" (centered around Superman and Peacemaker) and satellite projects that, I assume, can exist without much of his influence and without major impact on his films (Clayface, Lanterns). Batman being apparently his favorite character, I guess he'll join the former group...
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Off topic, but about Lindelof:
I started rewatching his Watchmen series, which I hadn't seen since it was first broadcast. I remember liking it but forgetting the details... and I don't know how I managed to forget so much, because I'm having a really, really great time rediscovering this series, which this time should definitely stick in my memory.
It's also a serious reminder of how dense and rigorous a superhero series can be when people really put their minds to it...