I think the rebounds one is truly 100% unbreakable, the game isn’t played in a way that allows that many rebounds anymore. Lets say we even take the most rebounds in a season in all of the 2000s (Andre Drummond has a year with 1247). It would take into the 20th season of being better than anyone has in 20+ years.
I was shocked watching the game how well he held up against Joker in the limited amount of posessions he got. The Wemby at the 5 stretches looked a lot more coherent on offense too. I’m sure Joker would have killed him if they played that matchup all game (And did get him a few times not shown in the clips). But that was super promising for the future.
Steals might be possible too. It would take a guy playing like New Orleans Chris Paul for an extended stretch though.