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
Kingdom Hearts III
NEO The World Ends With You
Shin Megami Tensei V
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.