I don't think that would work very well. You'd get some action in an all Superman books thread, Batman and Green Lantern but everything else would get buried after a few posts.
I think there are only a few of us reading I,Vampire, JLDark, Aquaman or All Star Western. We wouldn't fill up a whole page for each issue, nor does each issue require that much discussion.
Now that the nu52 is essentially a year old we could label a new thread just DC Comics talk.
Frankly we need something like that for Marvel as well.