The big reveal late in the SDS stream today was the reveal of switch-hitting legend Mickey Mantle being in MLB The Show 20.
This is a huge get for the series, and he will also be available in the pre-order diamond choice pack.
This is the pack you will get if you pre-order any “premium” version of MLB The Show 20. Basically, if you pre-order any version of the game that is not just the base version ($60 USD), then you will get to pick from one of these seven players. If you pre-order the most expensive version of the game, you will get to select two of these players.