Why do you see the prince to come as being a future Antichrist when we know that the city and sanctuary were destroyed in 70 AD? If it was referring to a Roman ruler/prince then it would be someone who was the ruler/prince of the Romans in 70 AD.
My reasoning is...
1. Christ in context of the Jewish expectation of the messiah is to be the great King of Israel descended from king David. In John 4:25, Christ and messiah are equated to each other. In Mark 15:32, "Christ, the king of Israel".
2. "Anti" - the prefix - means instead of and/or against. In the case of the Anti-christ, it means both instead of and against - Jesus the true Christ.
3. In Judaism, based on some scriptures, they believe the messiah (moshiach in their terminology) will fight the battles of God in defending Israel.
4. In Judaism, the messiah well teach them how to follow Torah, which includes the law of Moses. In Deuteronomy 31:9-13, Moses established as requirement of all future leaders of Israel, on a 7 year cycle, to have the law read to the gathering of the nation at the place of God's choosing.
The Jews (Judaism) take that event to take place on the temple mount as the place of God's choosing.
5. In Daniel 9:21, Daniel acknowledged seeing Gabriel for the first time in the vision - inferring to the vision Daniel had in Daniel 8 concerning the little horn and his desolation of the temple, in the end times, which Gabriel explained - but Daniel did not understand (Daniel 8:27) simply because there was not enough information given.
6. In Daniel 9:22, Gabriel says he is "now" come forth to give thee skill and understanding. That is, to give more information about the little horn vision, so that Daniel could understand about the little horn, and the stopping of the daily sacrifice and the desolation of the temple - in "the time of the end" (Daniel 8:17).
7. In Daniel 9:24, to seal up the vision and prophecy, i.e. fulfill the vision and prophecy about the little horn person.
8. In Daniel 7, the little horn rises from the fourth kingdom, the Roman Empire (the people who destroyed the temple and city in Daniel 9:26), in the end times because that is when the vision of the little horn is in Daniel 8.
9. In Daniel 8:23, the little horn stands up, an idiom for prepares to go to war.
10. In Daniel 8:9, the little horn waxes strong to the south and east, toward the promised land.
11. In Daniel 8:25, the little horn destroys many by peace.
12. In Daniel 8:25, the little horn meets his end when he attempts to stand up against the Prince of princes, Jesus. The little horn will be "the beast" at that time. (so we know from his opposition to Jesus that the little horn is antichrist in spirit.)
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Putting all of those things together, the little horn person will become leader of the EU.
And when Gog/Magog appears imminent, the little horn person prepares to go to war, staging his army in Greece, one of the breakup kingdoms of Alexander's empire.
Gog/Magog will happen; Gog's army destroyed supernaturally by God.
In the aftermath following Gog/Magog, the little horn
as the prince who shall come will move his EU army into the middle east on the premise of being the peace keeper in the region.
The Jews, many of whom believe that the messianic age will follow Gog/Magog, will think the little horn person is the messiah, in large part for his apparent intent to defend to them.
The false prophet will anoint the little horn person as the King of Israel - coming in his own name. It is then that the little horn becomes the Antichrist.
In that role, he will have the law read to the nation from the temple mount, confirming the Mt. Sinai covenant, and beginning the 7 year 70th week of Daniel 9.
Which in the middle of the week as the Antichrist, he will violate the covenant, by declaring himself to have achieved God-hood, and stopping the daily sacrifice.
It will reveal himself to be the man of sin, and not the messiah after all to the Jews. And they will reject him from continuing as their king - ending his time as the Antichrist.
Later, he becomes the beast of Revelation, dictator of the EU, kingdom of the beast.