I dont think Hide and Sneak is the next broken deck (that title is very well guarded by Dragapult to be honest) but I am pretty sure it will be a very popular deck choice and players are going to love its dynamic
For instance, this no-rarity Poliwrath is extremely rare, with only three known to exist with a perfect PSA 10 rating one of which sold for over $25,000 in late 2020 (Source)
The Sprees are cards I would definitely at least consider when you build a deck
For example, if the revealed card is a noncreature artifact card and March of the Machines (an enchantment with "Each noncreature artifact is an artifact creature with power and toughness each equal to its mana value.") is on the battlefield, it won't be turned face up
To date, there have been 26 pairs of dual sets released, with another two in the pipeline as of this article
Again, 151 delivers a masterpiece where one of the franchises most iconic Pokmon is found in its natural habitat