But if there will only be one of them, I don't think it will be THAT bad what with all the Cosmic Cyclone. Even players who are new or don't have a lot could still throw some de-spell in their deck to counter it. But more than one copy? Definitely something big.
They'll probably eventually do a structure deck or box. Followed by an Ishizu event. Like nearly of the amazon cards are in the game apart from the fusions, village, archer and call.