MBC Every1 stated recently, "Shinhwa, who will be coming back in January, have confirmed to be appearing. The staff members and many others are looking forward to an amazing broadcast. The Shinhwa members themselves are also burning with their will."
It's Shinhwa's first time being on the show as a full group. Andy and Hyesung were on the show before, and Hyesung had promised the full group would come on the show.
As Shinhwa has more title songs than any other idol that's appeared on the show so far (as it's now their 18th anniversary since debut), they're sure to put on an amazing performance for the random play dance segment as well.
The episode will air in mid-January!