I am not a fan of introducing the Wildstorm characters into the main DC universe as most of them are rip offs of DC characters anyway. They really serve the same role as Squadron Supreme over in Marvel.
I really wish there was a Planetary
book in the DCnU.
I know it's not feasible for Ellis to write it or Cassaday to draw it. But if it were written under Ellis' direction, I'd be all over it.
Elijah Snow and his team investigating the secret history of the DCnU. It would be fantastic.
I should note that Planetary
barely fit in the Wildstorm universe to start with. Hell, Wildstorm rebooted before Planetary
#27, and that didn't affect the ending of Planetary
one bit, with the world now a technological utopia thanks to Snow and the Planetary Foundation using the Four's technology.