Real Housewives, assemble!  Bravo has revealed the official cast list for The Real Housewives Ultimate Girls Trip: Roaring 20th, the upcoming series in celebration of the franchise’s landmark 20th anniversary.  Seven “franchise-defining women” (mostly OGs) from the network’s portfolio have been chosen to star in the show, where they will travel across the country to various locations featured throughout Real Housewives history.  Aside from the core cast, Bravo has promised an abundance of other Housewives will appear in the special season from across the various cities. The show had a previous working title of Real Housewives: Ultimate Road Trip, hence the theme of the women hitting the road. Earlier Wednesday, before Andy Cohen revealed the cast on Watch What Happens Live, he further confirmed NeNe Leakes would make her Bravo return in the special series.  The official logline for Real Housewives Ultimate Girls Trip reads, “In this special event series, the Housewives make their way through some of the most memorable locations in the franchise’s history — from Orange County where it all began to …