Nietzsche claimed that "we killed God". Thus, as Nietzsche thought, it would result in nihilism.
He also "introduced" an idea of the overman. This question is not about what the overman is. But I'm asking how is the overman different from, say, Kalki or Jesus. They all are the figures which are "yet to come". Isn't the overman simply the idea that gave meaning to Nietzsche's life like Second Coming gives meaning to Christian's life?