Variety takes a closer look at some of this summer’s most anticipated new and returning premieres. Mark your calendars! “Hacks” (HBO Max)Following an Emmy-winning first season, Jean Smart’s Deborah Vance and Hannah Einbinder’s Ava leave Las Vegas, hitting the road in a tour bus — with new material in the works — when Season 2 kicks off. New additions to the season include guest stars Laurie Metcalf, Ming-Na Wen, Martha Kelly, Margaret Cho, Susie Essman and Devon Sawa.