This is the Torah, will it not be replaced???

In the wording of the 13 Principles as it is in the Siddur, we believe that this Torah will not be replaced and there will be no other Torah from the Creator. In the 13 Principles of the Rambam, this is not written, but at the beginning of the fifth part of the Misvah, there is something along the lines of "and z"l
It is clear and explicit in the Torah that it is a commandment that stands forever and for all eternity, there is no change, no deficiency, no addition. As it is said, "All the things which I command you, you shall observe to do, you shall not add to them or subtract from them." And it is said, "And they shall be revealed to us and to our children forever, that we may do all the words of this Torah." Have you not learned that all the words of the Torah are commanded us to do forever? And so it says, "A statute for ever for your generations." And it is said, "Not in heaven." Have you learned that a prophet is not authorized to innovate anything from now on? Therefore, if anyone stands up, whether from the nations or from Israel, and performs a sign or a wonder, and says that the Lord sent him to add a commandment or to subtract a commandment or to interpret a commandment from the commandments, an interpretation that we did not hear from Moses, or that those commandments with which Israel was commanded are not forever and for generations to come, but were commandments according to time? Then this is a false prophet. For he came to deny the prophecy of Moses and his death by strangulation for daring to speak in the name of the Lord, which he did not command him. Blessed is his name. He commanded Moses that this commandment is for us and our children forever, and no one else will lie.
The determination that there will be no other Torah from the Boitesh is seemingly an excessive leap from the Gemara of those who command that no prophet is permitted to innovate anything from now on, in that it states that there will be no change even by the Kabbalah, and simple logic (mine) says that we do not know God's plans (unless He has revealed them to us) and it could be that tomorrow, at a new Mount Sinai, some of the Torah commandments will change.
I would love to hear the Rabbi's (and the surfers') opinion on this matter.