Continuing through the Catechism of the Catholic Church as it relates to prophecy:
849 The missionary mandate. “Having been divinely sent to the nations that she might be ‘the universal sacrament of salvation,’ the Church, in obedience to the command of her founder and because it is demanded by her own essential universality, strives to preach the Gospel to all men”: “Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them to observe all that I have commanded you; and Lo, I am with you always, until the close of the age.”
860 In the office of the apostles there is one aspect that cannot be transmitted: to be the chosen witnesses of the Lord’s Resurrection and so the foundation stones of the Church. But their office also has a permanent aspect. Christ promised to remain with them always. The divine mission entrusted by Jesus to them “will continue to the end of time, since the Gospel they handed on is the lasting source of all life for the Church. Therefore, the apostles took care to appoint successors.”
865 The Church is ultimately one, holy, catholic, and apostolic in her deepest and ultimate identity, because it is in her that “the Kingdom of heaven,” the “Reign of God,” already exists and will be fulfilled at the end of time. The kingdom has come in the person of Christ and grows mysteriously in the hearts of those incorporated into him, until its full eschatological manifestation. Then all those he has redeemed and made “holy and blameless before him in love,” will be gathered together as the one People of God, the “Bride of the Lamb,” “the holy city Jerusalem coming down out of heaven from God, having the glory of God.” For “the wall of the city had twelve foundations, and on them the twelve names of the twelve apostles of the Lamb.”
This is one of the key prophetic messages from Scripture (#849 above) that indicates that the end of the age will not come until a complete evangelization has occurred. We live in interesting times in that we have the technology in so many ways to reach all corners of the globe, and even to the extent that technology doesn’t exist in all places, the ease with which we can travel allows access to nearly everywhere. The only current practical limitations to evangelization are governmental restrictions that limit the ability to evangelize. God will break these barriers down when the time is right, and whenever that happens, it may be an indication that the close of the age is nearing.
An unbroken succession of Bishops, or “Apostles” will be maintained until the end of time, and it is in that line that the Kingdom of Heaven exists on its way to ultimate fulfillment in perfection with Christ’s return.