A new Shaymin has been revealed from S5a Matchless Fighters, which releases in Japan on March 19th. Shaymin will likely become part of our next main set following Battle Styles.
[C] Return: 10 damage. You may draw cards until you have 6 cards in your hand.
[C][C] Sky Return: 30 damage. Return this Pokemon and all cards attached to it to your hand.
Weakness: Lightning (x2)
Resistance: Fighting (-30)