The tally currently includes Stranger Things, Fortnite, Street Fighter, The Walking Dead, and Warhammer 40,000, and it'll expand even more with next year's arrival of tie-ins for Lord of the Rings, Doctor Who, and Transformers
Pushing the impactful cards to higher rarities helps make the games more even-keeled in Limited because of card as-fans (the rate at which a certain card or subset of cards show up within an average booster pack) and in casual Constructed because of card availability
Siegfried, Famed SwordsmanSiegfried, Famed Swordsman can be very, very big in the right situations, and does come with built-in evasion in the form of menace
plus the return of some old favorites
When it comes to key pieces that you can't afford to lose to the void that is the exile zone, this could wind up coming in handy from time to time