Randy Orton is going to be getting his rematch at the AllState Arena in Chicago. It was posted over on their Facebook page of the arena. It's going to be taken place on September 24th. At this time, it is scheduled to be a WWE live event, but to be fair it is just one day before RAW's Clash of Champions PPV which is why it may not be a RAW or a Smackdown live event.
The other WWE superstars scheduled to appear for WWE's 9/24 event in Chicago are Roman Reigns, Seth Rollins, Kevin Owens, Sasha Banks, Charlotte, Bayley, New Day, Jericho, Enzo & Cass and many other talents