Robert Feder had in his robservations about Cumulus Media, that owns WLS AM has interest in buying WGN Radio https://www.robertfeder.com/2018/12/10/robservations-wls-owner-talks-interest-buying-wgn-radio/ , it is the lead story in his Robservations. And personally I don't see how they would be a good fit as they like to have syndicated talk shows, and WGN Radio has been pretty much live and local.