While its not expected that any new Pokmon species will debut in the game, hints in the games marketing suggest that more new Mega Evolutions will be added, which could make their TCG debuts alongside Dragonite
But it is a two mana card that can stop multiple creatures for free and then eventually become a game winning threat
Addendum: If you use just the keyworded portion of haunt and discard the rest of the mechanic as used in Ravnica, the options open up to most simple aura effects
Fun fact: Turtonators shell can cause massive explosions, making it both a fearsome fighter and a fascinating collectors gem
With retro frame cards, anime-styled cards, and even serialized cards, there was a huge potential for big pulls
While we don't know if this is consistent across all Pokemon sleeves, we are confident that any sleeve featuring this extra barrier will have no opacity issues