Currently Online 
curl-6 on 09 March 2023
If I had to do them, I guess I'd go with Killzone Shadowfall for PS4 and Ryse Son of Rome for the Xbox One, probably as they were the first big "next gen" exclusives on them. Or maybe Horizon Zero Dawn for PS4 and Halo 5 for Xbone.
Nothing on PS5 or Xbox Series really stands out yet.
Bet with Liquidlaser: I say PS5 and Xbox Series will sell more than 56 million combined by the end of 2023. (And over 130 million lifetime)
