Nothing New in the Quran:-
41:43 Nothing is said to thee that was not said to the apostles before thee: That thy Lord has at His command (all) Forgiveness as well as a most Grievous Penalty.
42:13 The same religion has He established for you as that which He enjoined on Noah-the which We have sent by inspiration to thee-and that which We enjoined on Abraham Moses and Jesus: Namely that ye should remain steadfast in Religion and make no divisions therein: to those who worship other things than Allah hard is the (way) to which thou callest them. Allah chooses to Himself those whom He pleases and guides to Himself those who turn (to Him).
46:9 Say: "I am no bringer of new-fangled doctrine among the apostles nor do I know what will be done with me or with you. I follow but that which is revealed to me by inspiration: I am but a Warner open and clear."
46:10 Say: "See ye? If (this teaching) be from Allah and ye reject it and a witness from among the Children of Israel testifies to its similarity (with earlier scriptures) and has believed while ye are arrogant (how unjust ye are!) truly Allah guides not a people unjust.
*** Based upon Muhammad's own words, his Quran was not REVEALING any NEW concepts, precepts, thoughts or ideas but only CONFIRMING previous revelations ***