Cynthia Littleton Business EditorNexstar TV stations returned to Dish Network’s lineup on Christmas after a 23-day blackout.The sides struck a deal late on Christmas Eve to restore 164 Nexstar stations and WGN America to the satcaster’s lineup. WGN America, which has transformed its primetime lineup into a national newscast, will also launch on Dish’s virtual MVPD, Sling, early next year.Nexstar stations went dark Dec.