1)Daniel 12 states the end time is when the power of the Jews would finally be shattered. There is no other end time
that the Lord prophesied about. Daniel 12 should be read right after ch.10Prophecy of the End Time
12 “At that time Michael shall stand up,
The great prince who stands watch over the sons of your people;And there shall be a time of trouble,
Such as never was since there was a nation
Even to that time.
And at that time your people shall be delivered,
Every one who is found written in the book.
And many of those who sleep in the dust of the earth shall awake,
Some to everlasting life,
Some to shame and everlasting [a]contempt.
Those who are wise shall shine
Like the brightness of the firmament,
And those who turn many to righteousness
Like the stars forever and ever.
4 “But you, Daniel, shut up the words, and seal the book until the time of the end
; many shall run to and fro, and knowledge shall increase.”
5 Then I, Daniel, looked; and there stood two others, one on this riverbank and the other on that riverbank. 6 And one said to the man clothed in linen, who was above the waters of the river, “How long shall the fulfillment of these wonders be?”
7 Then I heard the man clothed in linen, who was above the waters of the river, when he held up his right hand and his left hand to heaven, and swore by Him who lives forever, that it shall be for a time, times, and half a time;
and when the power of the holy people has been completely shattered, all these things shall be finished.
8 Although I heard, I did not understand. Then I said, “My lord, what shall be the end of these things?”
9 And he said, “Go your way, Daniel, for the words are closed up and sealed till the time of the end.
AD Feb.67- August 70 was the attack on the Jews by the Romans.
RB said:Luke 21:33-36~"Heaven and earth shall pass away: but my words shall not pass away. And take heed to yourselves, lest at any time your hearts be overcharged with surfeiting, and drunkenness, and cares of this life, and so that day come upon you unawares. For as a snare shall it come on all them that dwell on the face of the whole earth. Watch ye therefore, and pray always, that ye may be accounted worthy to escape all these things that shall come to pass, and to stand before the Son of man."
The whole earth is mostly used in Scripture to describe the land the earth, or the land of Palestine.(A LOOK AT LUKE 21:34-36
Before going on to the rest of Matthew 24, some details from Luke 21:34-36 are also very much worth noting. This passage follows His two-fold declaration in verses 32-33 that  His own generation and  heaven and earth would pass away. He then says,
“But watch yourselves lest your hearts be weighed down with dissipation and drunkenness and cares of this life, and that day come upon you suddenly like a trap. For it will come upon all who dwell on the face of the whole earth. But stay awake at all times, praying that you may have strength to escape all these things that are going to take place, and to stand before the Son of Man” (Luke 21:34-36).
In verse 34, Jesus refers to “that day.” Taking this reference in context, what day would He be referring to? It should be clear that He was referring  to the passing of His generation after all that He had prophesied would take place and  to the passing away of heaven and earth. This command to “watch yourselves” was given to His followers living in the first century.
In verse 35, Jesus says “that day” will come “upon all who dwell on the face of the whole earth.” On the Biblos Online Parallel Bible website (www.bible.cc), there are 18 parallel translations listed for this verse. All of them render the final phrase of this verse as “the whole earth,” except for Young’s Literal Translation, which renders it as “all the land.” Indeed, the Greek word used here, “ge,” can be rendered as “land” in many cases where it is used, and can refer specifically to the Promised Land (i.e. Israel). In various commentaries on Luke 21:35, Albert Barnes (1834) and Adam Clarke (1831) agreed that these troubles were to come upon Judea, and John Gill (1746-1763) said that Jerusalem, Galilee, and Judea suffered the calamities that Jesus predicted.
This certainly makes sense here, as we have already seen in Luke 21:23 that Jesus says those days would be full of great distress for “this people” and for “the earth” (or “the land”), and this is very clearly equated with “those who are in Judea” (Luke 21:21). The same Greek word, “ge,” is also used in verse 23, and there it is rendered as “land” instead of as “earth” 17 out of 18 times in the Biblos entry for that verse.
The expression “those who dwell on the earth” (or similar forms of this expression) can also be seen often in the book of Revelation, and a solid case can be made that it refers, not to the globe, but to 1st century apostate Israel. See the 3-part series I have written on this phenomenon: here, here, and here.
Lastly, in Luke 21:36, we see that Jesus makes reference to “all these things that are going to take place.” In verses 34-36 He does not detail any number of things that are going to take place. We must conclude, then, that He is referring to what He has already described in verses 5-32 (see verses 7, 9, 12, 22, 26, 31, and 32 for similar references). This is further evidence that Jesus does not, as some have suggested, speak of 1st century events in certain parts of this chapter and speak of yet unfulfilled events in other parts. For He declares in verse 32 that all these things must take place before His own generation passes away. Furthermore, in verses 8 and following He details the signs which must take place before the temple was to be completely destroyed (see verses 6-7), an event that we know took place in 70 AD.)
Lastly, RB, you deny the Holy Writ if you say that Paul didn't claim, at least 3 times, that the gospel was preached to the known world at that time!
There are other similar passages that may be combined with Colossians 1:23. Earlier, in the same chapter, Paul exults in the fact that the gospel was bearing fruit “in all the world” (v. 6).Elsewhere, the apostle stated that the faith of the Christians in Rome was being “proclaimed throughout the whole world” (Romans 1:8, 16:19). Also in Romans 10, Paul, borrowing from language that highlights the vast influence of the sun’s illuminating power (Psalm 19:4), contended that the gospel “sound” went out “into all the earth,” even “to the ends of the world” (v. 18). The brethren in Thessalonica were commended because their evangelistic fervor had echoed not only throughout Macedonia and Achaia, but “in every place” (1 Thessalonians 1:8).
Colossians 1:23, 23 if indeed you continue in the faith, grounded and steadfast, and are not moved away from the hope of the gospel which you heard, which was preached to every creature under heaven, of which I, Paul, became a minister. In Titus 2:11,121 For the grace of God has appeared that offers salvation to all people. 12 It teaches us to say “No” to ungodliness and worldly passions, and to live self-controlled, upright and godly lives in this present age,.
That was their
present age. The age to come is Christian age, which the kingdom came in all its fullness in AD70, and has no end.
As far as Romans 15:24 speaking about Spain, many scholars believe it is unclear whether Paul went to Spain or not. But I think there's an opinion that holds the most weight:https://www.biola.edu/blogs/good-book-blog/2015/paul-s-4th-missionary-journey-and-i-don-t-mean-his-trip-to-rome