First off, both Kyurem forms retain their Dragon/Ice typing. This may be a disappointment to some, but I sort of saw it coming. I mean, the presence of Cold Flare and Freeze Bolt means the Ice type isn't going away, and it's hard to see the Dragon type being lost as well. However, what this means is that Kyurem will absolutely need some extra moves from other types to be viable, such as Reshiram's and Zekrom's signature moves. Stats aren't the only issue with regular Kyurem, its movepool is also as deep as a puddle. I think we all know the first one will be taken care of, so moves are the name of the game now. Best case scenario is, it gets some new moves to give the regular form as hand-me-downs (such as Air Slash and Earth Power on Shaymin-L).
Also, Serebii heavily implies that the "big reveal" in tomorrow's Pokémon Smash episode is going to be Meloetta's Pirouette form. The reveal of a new Pokémon (which they also call alternate forms in that context) says it all... it can't be a gen 6 Pokémon just yet, it can't be Genesect either (three event Pokémon in the same year? Not happening), and only the Aria form has been revealed thus far. Calling it right now.