Carlos Justo, the face of Miami’s real estate boom — and then its bust — wants back in the game. After a multimillion-dollar bankruptcy, the end of his TLC network program “Million Dollar Agents,” and his disappearance from society columns, he’s ready to get back in the real estate business. After doing deals for J-Lo, Shaq, Versace, Gloria Estefan, Sylvester Stallone and Rosie O’Donnell, he seemed poised for continued success. He owned a dozen multimillion-dollar homes and was overextended when the market crashed. Now he’s struggling to pay his attorneys, settle ongoing disputes and regain some of the luster he lost.