Usually the first response to these threads is "Never gonna happen. Warner would never let DC go." Yes. Thank You. More than likely correct, atleast for the foreseeable future. Never say Never.
Still, yes your right as of right now out of the cards.
HOWEVER, THAT IS NOT THE QUESTION THAT IS BEING ASKED.
The question is whether or not it would be better off?
Now the first negative, or atleast one you can see that way, is that now both big comic companies would be owned by one company. This could be a positive. You decide.
It's clear to me that up until BATMAN VS SUPERMAN was announced Warners attempt to play ball with Marvel in the movie verse was going nowhere. Green Lantern is a perfect example. That movie says to me that they were scared of what they had, while at the same time atleast trying to push back. Ended in utter failure. BVS so far seems to be Warner actually trying to just say screw it, lets go all in. Batman actually wearing his armor from the comic is a testement to this.
However would Disney do it better? They aren't scared of what they've got. They have a hit movie with a raccoon and a talking tree in it. They even have room for a Duck.
Sounds to me under Disney we'd get the Flash movie we wanted. The Green Lantern movie we wanted. The Wonder Women we want with her actually being a Amazon.
Would the comics be run better? Maybe the same since Disney doesn't usually interfere there.
Seems like a nice discussion I'd think.
Yes it will never happen. Thank you, to those who will repeat this anyway.
EDIT: Just to make clear. My vision is that DC would be it's own company like Marvel is. Marvel wouldn't be running the comics or anything.