I haven't seen them announce the Buy a Box promo card yet, so I wondered what everyone hopes for or thinks it will likely be. I think it would be great to do a Full Art Stainglass variant of
Oath of Teferi. It would fit the Planeswalker theme, would keep a card in Standard that is Planeswalker relevant as Dominaria drops and not be so overpowered that it would
disrupt other deck types. Alternately, a new form of
The Immortal Sun would be in flavor and feature a Legendary Artifact that will definitely be in Ravnjca, maybe call it Immortal Sun Unlocked?