There is another way to read verse 26 and 27 which makes it even clearer there are 2 princes in those verses rather than one. IMO, verse 26 and 27 can also be read in the following manner, A) and B).
A)
And after threescore and two weeks shall Messiah be cut off, but not for himself: And he shall confirm the covenant with many for one week: and in the midst of the week he shall cause the sacrifice and the oblation to cease
Thus it is Christ that fulfilled the midst of the week 2000 years ago. Is anyone that agrees that Christ fulfilled the midst of the week going to then dispute that verse 26 and 27 can be read in this manner? Be sure to remember that if you have a dispute with B) being read in that manner but don't have a dispute with A) being read in that manner. In my view it's called cherry picking, thus not being consistent if one has no dispute with reading A) in that manner but has disputes with reading B) in that manner.
B)
and the people of the prince that shall come shall destroy the city and the sanctuary; and the end thereof shall be with a flood, and unto the end of the war desolations are determined. And for the overspreading of abominations he shall make it desolate, even until the consummation, and that determined shall be poured upon the desolate.
It seems that you want to re-write the verses to support the Preterit point of view? Dan 9:25-27 speak of only ONE prince, written as Messiah the Prince, Messiah cut off, the prince that shall come, and he shall confirm the covenant, and for the overspreading of abominations he shall make it desolate, even until the consummation, and that determined shall be poured upon the desolate.
Daniel 9:26-27 (KJV) And after threescore and two weeks shall Messiah be cut off, but not for himself: and the people of the prince that shall come shall destroy the city and the sanctuary; and the end thereof shall be with a flood, and unto the end of the war desolations are determined. And he shall confirm the covenant with many for one week: and in the midst of the week he shall cause the sacrifice and the oblation to cease, and for the overspreading of abominations he shall make it desolate, even until the consummation, and that determined shall be poured upon the desolate.
This passage depicts the advent of Christ coming 490 after the prophesy was given. Christ came to make atonement for sin by being crucified, it was by the cross that He was cut off, for the sins of His people. The people of Christ, Jews, had already spiritually destroyed the city and sanctuary long before Christ came to earth a man. We know this because when Christ walked the earth a man He said to them, "Behold, your house is left unto you desolate." How could Jerusalem be desolate before the physical destruction if the overspreading of abominations that make them desolate would not come until 70 AD?
Matthew 23:34-38 (KJV) Wherefore, behold, I send unto you prophets, and wise men, and scribes: and some of them ye shall kill and crucify; and some of them shall ye scourge in your synagogues, and persecute them from city to city: That upon you may come all the righteous blood shed upon the earth, from the blood of righteous Abel unto the blood of Zacharias son of Barachias, whom ye slew between the temple and the altar. Verily I say unto you, All these things shall come upon this generation. O Jerusalem, Jerusalem, thou that killest the prophets, and stonest them which are sent unto thee, how often would I have gathered thy children together, even as a hen gathereth her chickens under her wings, and ye would not! Behold, your house is left unto you desolate.
Because of the abominations, "he" shall make it desolate. IOW the prince of the Jews (Christ) after completing all that He came to accomplish listed in vs. 24, through the siege by the Roman Army literally/physically utterly destroyed Jerusalem, leaving it a spiritual wasteland which it shall be until the consummation or end of time when Christ shall come again.