The coolest things I've seen are the Japanese prototype cards
Each score is an average of ~107 votes each
I love this at multiplayer when you have a few options, and with Mana Rocks and Lands that can make any color of mana, because getting any color of mana from your Dimir control brew that grabs a red activated ability is pretty valuable, so run this with City of Brass and Darksteel Ingot and Fellwar Stone
Marketplace TCGplayer Sets Marketplace Cardmarket Sets Market Trend Price History Deck Usage & Meta Stats Public deck and tournament usage for Code Igniter
This is also evidenced by the inability to trade cards of 2 Star rarity or higher, as if players could immediately trade for their missing cards, they wouldn't need to spend $10 or $100 or more for a random chance of getting them
Pokemon TCG's releases have yet to be announced, but they will probably introduce products that will compete for a piece of late summer consumer dollars as well.