Eeveemaster
Amemoth Fan :D
I think it would be cool if they utilized the moon stone. Hasn't been used for an evee before and I think it would be a fitting stone for some other fairy evolving as well.
Umbreon ain't happy.. Then again Leafeon and Espeon ditched the much befitting Leaf and Sun stones.. But I still don't think it'll use moon stone as Umbreon somewhat represent the moon..