All of the Warner Archive Collection titles that i have gotten were pressed not burned that is for BD content.
DVD is a different story, some releases receive an initial pressing then DVD-R
Justice League Season 1 and 2 both got a Release, Justice League Unlimited The Complete Series got a blu release via WAC
as did Green Lantern , Batman Brave and Bold S1 and S2, Beware the Batman 1&2, and Teen titans, all have releases on WAC just give a search
Batman: Mystery of the Batwoman...