Ton of games have released or are releasing that I never thought would happen. YMMV on some of them though.
Age of Empires IV
Age of Empires Definitive Edition
Age of Empires II Definitive Edition
Bravely Default 2
Command and Conquer Remastered
Demon's Souls Remake
Dragon Quest 3 Remake
Final Fantasy X/X-2 Remastered
Final Fantasy XII The Zodiac Age
Final Fantasy XV
Great Ace Attorney Localization
Horizon Forbidden West
The Last Guardian
Half-Life Alex
Kingdom Hearts III
NEO The World Ends With You
Metroid Dread
Shin Megami Tensei V
Starcraft 2
Tales of Arise
Xenoblade Chronicles Definitive Edition
Entire mainline Yakuza series on PC
Halo on PC
I'll agree with everyone who said Metroid Dread. I first heard about that way back in 2005.
As for a game that hasn't been mentioned yet, definitely Mega Man 11. I genuinely thought the series was dead after the cancellation of Legends 3 and Universe and Capcom not giving a shit about MM for most of the '10s. Those Legacy collections must have sold really well.