I would venture to say that had the so called “Reformation” not occurred, neither would Mormonism have occurred. Joseph Smith was caught up in the Adventist movement, which could also be called the “Restoration” movement.
The Adventist movement was started by William Miller who first shared publicly his belief in the coming Second Advent of Jesus Christ in 1833. Joseph Smith had already accomplished all of the following before William Miller had made public for the first time his Millenarist intentions:
Spring 1820 age: 14
Joseph receives the First Vision in the Sacred Grove in answer to a prayer about which church to join.
September 21-22 1823 age: 17
Joseph is visited five times by the angel Moroni, who reveals to Joseph information about the Book of Mormon and how to restore Christ’s gospel.
September 22, 1827 age: 21
Joseph receives the gold plates from the angel Moroni at the Hill Cumorah and begins translation of the Book of Mormon with the help of the Urim and Thummim.
May 15, 1829 age: 23
Joseph Smith and Oliver Cowdery receive the Aaronic Priesthood from John the Baptist and are baptized.
May or June 1829 age: 23
Joseph receives the Melchizedek Priesthood and is ordained an apostle by Peter, James, and John in Harmony, Pennsylvania.
June 1, 1829 age: 23
Joseph moves to Fayette, New York and stays with the Peter Whitmer family. Translation of the Book of Mormon continues.
June 11, 1829 age: 23
Joseph obtains a copyright for the Book of Mormon.
June 1829 age: 23
Joseph completes the translation of the Book of Mormon and the Three Witnesses and Eight Witnesses see the gold plates.
March 26, 1830 age: 24
The first printed copies of the Book of Mormon are made available.
April 6, 1830 age: 24
Joseph Smith officially organizes the Church in Fayette, New York.
April 11, 1830 age: 24
The first Sunday meeting of the Church is held.
June 9, 1830 age: 24
The first conference of the Church is held.
June 27-28, 1830 age: 24
Many want to be baptized in Colesville. Joseph visits them and they attempt baptisms, but a mob stops them. They try again the next day and are successful in baptizing thirteen people.
August 1830 age: 24
Joseph begins his [inspired] translation of the Bible.
December 1830- January 1831 age: 25
Joseph receives revelation that the members of the Church should gather in Ohio.
July 20, 1831 age: 25
Joseph receives revelation that the site of Zion is Independence, Missouri.
August 3, 1831 age: 25
Joseph dedicates a site for a temple in Missouri.
Late August 1831 age: 25
Joseph returns to Kirtland.
November 1, 1831 age: 25
Joseph has compiled all of the revelations he has received so far and the members of the Church decide to print them under the name “Book of Commandments.” This book is now known as the Doctrine and Covenants.
January 25, 1832 age: 26
Joseph becomes the president and prophet of the Mormon Church. He serves in this position for twelve years until his death.
February 16, 1832 age: 26
Joseph and Sidney Rigdon see a vision concerning life after death. This vision is now found in Doctrine and Covenants Section 76.
Joseph Smith had accomplished all of that (and more), before William Miller had even been heard of by anybody. So who do you think is more likely to have borrowed any ideas from whom?
I find it interesting that each of the churches that claims to be a restoration is unrecognizable when compared to the beliefs of the early Church. Their doctrines are all based upon so-called “new revelation” and prophecies (none of which have come true) from their founders which contradict the faith of the Apostles.
A restoration means restoring something to its original state. Mormon doctrine has restored nothing. Instead it has painted clown faces over a masterpiece.
Mormonism claims a restoration of the priesthood authority of the original church, the the “keys of the kingdom,” and an open canon of scripture. That is what the original church had, and that is what Mormonism has today.