Obviously there's the qualifier that regular season basketball may return, but even if they play out the last ~15 games it's near statistically impossible for him to not set this record in dominant fashion.
Mitch sits at an ORTG of 143.97, surpassing the previous record of 134.65. Alongside this, he also holds the single-season record for TS% and sits in a virtual tie for 4th in this season's WS/48. While stats like these are never a perfect science, it's at least clear that he projects to be one of the best shot-blocking rim-runners the game has seen.