He went on to reveal the new character being added exclusively to the console version The Binding of Isaac: Rebirth called the Mystery Man, "a randomly generated character that you play with that has randomly generated items - of the items you've unlocked - as well as randomly-generated stats. But it's a real cool risk-reward design where basically every time you killed Mom you'd get a credit to use the Mystery Man." The character has to be unlocked during the game.
Check out the interview in the video podcast below.