Ether 4

Moroni tells us that after the Savior showed himself unto the brother of Jared -

"...he showed unto the brother of Jared all the inhabitants of the earth which had been, and also all that would be; and he withheld them not from his sight, even unto the ends of the earth.
26 For he had said unto him in times before, that if he would believe in him that he could show unto him all things—it should be shown unto him; therefore the Lord could not withhold anything from him, for he knew that the Lord could show him all things.
27 And the Lord said unto him: Write these things and seal them up; and I will show them in mine own due time unto the children of men."  (Book of Mormon | Ether 3:25 - 27)

Later Moroni writes -

"...I have written upon these plates the very things which the brother of Jared saw; and there never were greater things made manifest than those which were made manifest unto the brother of Jared.
5 Wherefore the Lord hath commanded me to write them; and I have written them.  And he commanded me that I should seal them up; and he also hath commanded that I should seal up the interpretation thereof; wherefore I have sealed up the interpreters, according to the commandment of the Lord.
6 For the Lord said unto me: They shall not go forth unto the Gentiles until the day that they shall repent of their iniquity, and become clean before the Lord."  (Book of Mormon | Ether 4:4 - 6)

Adding -

"...in that day that they shall exercise faith in me, saith the Lord, even as the brother of Jared did, that they may become sanctified in me, then will I manifest unto them the things which the brother of Jared saw, even to the unfolding unto them all my revelations, saith Jesus Christ, the Son of God, the Father of the heavens and of the earth, and all things that in them are."  (Book of Mormon | Ether 4:7)

I look forward to the day that all of that which the brother of Jared saw, is revealed.