Karlo Broussard, Catholic author, gives a few signs that the end times are near. He quotes the Catechism of the Catholic Church and the Bible to give us an idea of the prerequisites of the end of the world.

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CCC 674:
The glorious Messiah's coming is suspended at every moment of history until his recognition by "all Israel", for "a hardening has come upon part of Israel" in their "unbelief" toward Jesus. St. Peter says to the Jews of Jerusalem after Pentecost: "Repent therefore, and turn again, that your sins may be blotted out, that times of refreshing may come from the presence of the Lord, and that he may send the Christ appointed for you, Jesus, whom heaven must receive until the time for establishing all that God spoke by the mouth of his holy prophets from of old." St. Paul echoes him: "For if their rejection means the reconciliation of the world, what will their acceptance mean but life from the dead?" The "full inclusion" of the Jews in the Messiah's salvation, in the wake of "the full number of the Gentiles", will enable the People of God to achieve "the measure of the stature of the fullness of Christ", in which "God may be all in all".

CCC 675:
Before Christ's second coming the Church must pass through a final trial that will shake the faith of many believers. The persecution that accompanies her pilgrimage on earth will unveil the "mystery of iniquity" in the form of a religious deception offering men an apparent solution to their problems at the price of apostasy from the truth. The supreme religious deception is that of the Antichrist, a pseudo-messianism by which man glorifies himself in place of God and of his Messiah come in the flesh.

2 Thessalonians 2:3-15 (RSVCE)
3 Let no one deceive you in any way; for that day will not come, unless the rebellion comes first, and the man of lawlessness is revealed, the son of perdition, 4 who opposes and exalts himself against every so-called god or object of worship, so that he takes his seat in the temple of God, proclaiming himself to be God. 5 Do you not remember that when I was still with you I told you this? 6 And you know what is restraining him now so that he may be revealed in his time. 7 For the mystery of lawlessness is already at work; only he who now restrains it will do so until he is out of the way. 8 And then the lawless one will be revealed, and the Lord Jesus will slay him with the breath of his mouth and destroy him by his appearing and his coming. 9 The coming of the lawless one by the activity of Satan will be with all power and with pretended signs and wonders, 10 and with all wicked deception for those who are to perish, because they refused to love the truth and so be saved. 11 Therefore God sends upon them a strong delusion, to make them believe what is false, 12 so that all may be condemned who did not believe the truth but had pleasure in unrighteousness.
13 But we are bound to give thanks to God always for you, brethren beloved by the Lord, because God chose you from the beginning to be saved, through sanctification by the Spirit and belief in the truth. 14 To this he called you through our gospel, so that you may obtain the glory of our Lord Jesus Christ. 15 So then, brethren, stand firm and hold to the traditions which you were taught by us, either by word of mouth or by letter.