Restless Apparition Turning into a giant monster with enough mana makes Restless Apparition a big late-game threat that requires spot removal to take care of
Getting a bunch of 2/2s with vigilance for one mana apiece (not counting the pips) can easily populate a board, especially late game
It's also worth noting that Determined Iteration is good alongside Zurgo, one of the best Commanders in Tarkir Dragonstorm - which meant it was already trending upwards a little before Deadpool was announced
Both of these decks are going to work with their respective Strike cards and attempt to build an engine out of them
In the case where the exiled permanent returns with different creature types than it had when it left the battlefield (for example, if the target creature was copying something else when Splash Portal began to resolve), Splash Portal will check its creature types as it exists after returning to the battlefield
Best Buy is handy for local pickup, but availability can be inconsistent post-release
