If you have pre-ordered NBA 2K20, you should be able to play it when it becomes available on September 6, 2019 at 12am on your local time.
To play right away instead of waiting for the 74GB of data to download, preload the game by following these 5 easy steps:
Step 1: Open the ‘Library’
Step 2: Go to ‘Purchased’
Step 3: Select ‘NBA 2K20’
Step 4: Select ‘Download’
Step 5: The progress bar will indicate the preload status
When you exit, you will then see NBA 2K20 on your home screen and you can open the game to see the download progress.