https://discord.com/channels/423417570834513930/423417570834513932/1398608439785160817
Some sad news broke on Discord this morning regarding one of our users.
Chikorita, Bayleef and Meganium have been revealed for this set. The whole set, if I've read Japan's pattern correctly, will be fully revealed tomorrow.
Both Mega Camerupt ex and Mega Kangaskhan ex have now been officially revealed.
EDIT: Celebi (Grass, unfortunately) and Marshadow (Fighting) have also been revealed today.
EDIT 2: Kyogre has been revealed for this set.
With the remaining Megas yet to be revealed, I'm gonna predict that it will be Manectric, because there could be an opportunity for Ampharos to be a Dragon type, and there is also Charizard X as well.
EDIT: Thinking on from Ampharos, we could also see a Fighting type Mewtwo X in the near future...