I am generally a fan of James Gunn so I am willing to give him the benefit of the doubt, but some choices just seem unappealing to me. The Authority was always an odd fit for DC Comics. For those who don't know they were part of a totally different company, Wildstorm, that was bought by DC and in general attempts to integrate them, or any Wildstorm characters, into DC comics haven't worked. Maybe it will fit better into the movie plans. The Brave and The Bold is supposed to include Batman's son, Damien, who I hate with the fire of a thousand suns, and so am not looking at all forward to it. Waller is another strange one, she is a very unlikeable character and can be great in small doses as a foil, but a whole series based on her? DC's animated movies have been generally really good and I don't see a need to integrate them into the new DCU, just keep them on their current, successful path. I read somewhere that the plan is for the DCU to span movies, TV, animation and computer games and that seems like way too much work to follow.
I really hope this isn't an attempt to turn the DCU into the MCU with a bunch of interconnected stuff and overarching stories. First, catching that lightning in a bottle twice won't be easy. Second, will it be able to compete with the already established MCU if it is good? Finally, I love DC comics (comics in general really) but we are getting to the point where there is too much superhero content and only so many viewing hours in a day.