If the NT fulfilled the OT, is the Quran a final culmination of and fulfilling all three, with the jury still out on the Book of Mormon?

Is Islam God’s final, fullest and complete revelation to all of mankind, with Muhammad (PBUH) as God’s final messager and Prophet sent from God? This is opposed to being a false extension of Christianity as many Christians see, just as Jews see Christianity as a false extension of Judaism. No books in the Bible... show more Is Islam God’s final, fullest and complete revelation to all of mankind, with Muhammad (PBUH) as God’s final messager and Prophet sent from God? This is opposed to being a false extension of Christianity as many Christians see, just as Jews see Christianity as a false extension of Judaism.

No books in the Bible came after Revelations, so is it really either the Quran some 500 years later, or the Book of Mormon, if you feel that either Judaism or Christianity is incomplete with only partial revelation, and that Islam (or Joseph Smith) is the final piece and conclusion of the story and culmination of the scriptural timeline from Genesis.
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