Archives, Showcase, and Chronicles, and collections of material that's not current (or recent, I suppose), those will continue to be handled by Editors in Collected Editions.

As for Blackhawk? Never say never, but I think if the initial volume had done well enough for DC to follow it up, that would have happened by now. That it hasn't, that should give you some idea of how likely it is to happen now.

A Week Ago Tuesday: My blog, where I never, ever write about comics (though I think I did, once or twice).