Undoubtedly, the 70th week comes some time after the 69 weeks are over, when Jesus was Crucified.
As there is no 7 year period we can be sure of after that and the six tenets of
Daniel 9:24 remain unfulfilled; plus the prophesies about the second half of the final 7 years before Jesus Returns in Revelation, we can be quite confident that it remains to happen, maybe in our future.
Yes, you are correct in saying that Messiah's (Jesus') entrance is after the 69 weeks are over, which of course is for a period of only
"one week".
And of course, when one week ends, we can be assured that the next week begins, which in this case is the 70th week.
Therefore, since there is only a total of 70 weeks in that prophecy, one should first prove to themselves, that the 70th week does immediately follow the 69th week, before one takes a flying leap of faith, in order to enter into the realm of a "Time Warp", fabricated by church-ianity.
Man has this inherent problem with "train of thought". All literal words and sentence structure, must be read and studied according to consecutive, chronological order, in straight line thinking.
It's also known as learning by "the natural man", as opposed to learning by "the Mind of Christ".
God says the following about our problem, and how to correct it:
Isaiah 55:8-9, Zechariah 4:6 and John 16:13.
Since God's thoughts are not our thoughts, and His ways are not our ways, we need to adjust OUR thinking and OUR ways, when we dwell on His words and sentence structure. It's NOT being done according to OUR strait line thinking.
The Jews tried ever so hard to look for their Messiah, and
missed the day of their visitation.