The $50 million suit stems from an alleged rape in 1979.
Cesar Sanchez-Guzman filed the lawsuit back in December 2017.
Matthew Knowles, who also served as the group’s manager, repeatedly turned down offers to work with Kelly.
The smear campaign will look to discredit his many accusers.
The popular radio host was accused of raping a 15-year-old back in June 2001, but pled guilty to a lesser charge.