WGN-Channel 9 isn’t ready to name a replacement yet for Robert Jordan, who retired with all due fanfare last week as weekend news anchor after 43 years at the Tribune Broadcasting station. Until then, various staffers will be filling in alongside longtime co-anchor Jackie Bange, according to news director Jennifer Lyons. Up this weekend: Tahman Bradley will be anchoring on Saturday; Sean Lewis will anchor at 5 p.m. Sunday, and Bange will anchor solo at 9 p.m. Sunday.