Wow, the first page of this thread manages to pack 100 pages of salt thread vitriol into a neat little package.
Marvel Snap is an amazing first offering in a business sense. Regardless of longevity, I imagine the development costs have already been dwarfed by the returns, and introducing Second Dinner as a competent concern is more important than it has ever been in a world where a fairly high percentage of game launches don't begin to deliver as promised (to say nothing of the prominence of early access campaigns which fold without ever offering anything).
That being said, I would love to hear objective justification for the claims made regarding the "mediocre" track record of Hearthstone. Someone made the incredibly cringe "point" of suggesting that Hearthstone's relative obscurity compared to the Metal Gear franchise somehow proves . . . something. I hope that point wasn't doubled down too often in the subsequent pages. For anyone clinging to that brilliance as evidence, allow me to suggest that Hideo Kojima is a bum by your standards, and the real genius is the man/woman/wolfkin/etc behind Candy Crush (name recognition is your metric, not mine).
All this being said, I'm glad the "look out [established game], [month old game] is going to replace you" crowd is still hale and hearty. I've been enjoying those predictions since Aion was to kill World of Warcraft.