Ed Boon posted on his Twitter page a screenshot which reveals some more lost kontent - a Soul Chamber level that almost made it in to Midway's famed basketball series, NBA Hangtime. From the horse's mouth:

These images were going to be used in a "hidden MK court" for one of Midway's NBA Jam/Hangtime home ports. But the NBA said no. :(

To read the quote on Ed's page directly, go here. Our thanks go to Kombat19 for the word on this update!