Although many Latter day Saints are unfamiliar with the doctrine that Joseph Smith will be returning to the earth to usher in the Marvelous Work and the Dispensation of the Fulness of Times, it was once commonly understood and taught in the Church many years ago.
Here is what Brigham Young had to say about it:
"I will now tell you something that ought to comfort every man and woman on the face of the earth.
Joseph Smith, junior, will again be on this earth dictating plans and calling forth his brethren to be baptized for the very characters who wish this was not so, in order to bring them into a kingdom to enjoy, perhaps, the presence of angels or the spirits of good men, if they cannot endure the presence of the Father and the Son;
and he will never cease his operations, under the directions of the Son of God, until the last ones of the children of men are saved that can be, from Adam till now..." (Teachings of Brigham Young)
Apostle Orson Pratt mentioned that the dispensation of the fulness of times was the dispensation of the resurrection and that God would be bring some forth out of their graves to bring to pass certain transactions.
It was this very doctrine that inspired part of the song "Praise to the Man".
"millions shall know brother Joseph again..."