I want to see a wind kingdom as after the water kingdom, we’ll have all the other elements covered (fire = Blighted Lands, ice = Glacial Peaks, earth = Khaziel, nature = Maugrim/Thorns/Scales/Zhul’Kari, water = newness ). I could imagine a major theme of air being haste/speed, flying, and potentially knockaround effects (imagine a Legendary whose third trait is something like: Swap two random enemies and drain 1 mana from each on 4 or 5 gem matches).