If Cranston really is announced as Luthor it's gonna be by huge-ass coincidence, because that report comes from a site called Cosmic Book News that no one is linking to because if they do, you'll notice that it's a shitty fucking website that makes shit up and offers no sources. On the same article where they say "Cranston is Luthor" they also say "Matt Damon is Aquaman". I'm not kidding, look it up.