On Supreme Verdict:
Supreme Verdict might be the platonic ideal of a card that is poised to step up and into a role immediately come Return to Ravnica Standard: Automatic inclusion (if not four-of) in Azorius-capable control decks. This card will be the Wrath of God stand-in for Solar Flare, straight White-Blue Control, and essentially every variation. Assuming you can muster a single blue mana, you have essentially a better Day of Judgment.
Against a low-threat control deck, having Supreme Verdict in your deck might just ensure victory in the long term.
Consider White-Blue Miracles built on Alexander Hayne’s model (Entreat the Angels being the big/primary way to win). Strategic, patient play in a deck featuring both Supreme Verdict and Detention Sphere can perhaps lead to the certainty of victory.