Ac/DC shut it down. They are refusing to license any thing related to pinball and/or Stern. It's not about the money, per se. They feel Stern screwed them when they paid KISS so much more for the rights for their machine. When you have FU money, it becomes more about keeping score. (Money = Points), it would take an obscene amount of money to bring AC/DC back to the table with Stern. All tables since KISS have had digital rights built into the licensing agreement. AC/DC does not.