New IBF middleweight champion of the world Gennadiy Golovkin will return in early 2020, as Eddie Hearn charts a course for a fight with mandatory challenger Kamil Szeremeta in February or March. And while that fight is next on the docket for Golovkin, Hearn is looking to revive negotiations with Golden Boy Promotions to set up a May trilogy fight against Canelo Alvarez. Alvarez has been staunch in…