From every nation, they will come

Isaiah, the prophet, commissioned by God, to restore the survivors of Israel. Isaiah 49:5-6.

Isaiah 66:15-16 See: the Lord is coming in fire, His chariots are like a whirlwind, bringing retribution with His furious anger and His rebuke with flaming fire. The Lord will judge with fire and sword, He will test all mankind and many will be killed by Him.
[The Lord’s Day of vengeance and wrath – the next prophetic event. This fire judgement upon all the earth, will be by a coronal mass ejection from the sun. It will affect all the earth, but will particularly devastate the Middle East. Isaiah 63:1-6, Rev. 6:12-17, Jeremiah 12:14, Psalm 18:7-15, Isaiah 24:1-6, Malachi 4:1]
Isaiah 66:17:18a All those who practice magic rites and divination, those who eat unclean foods – all will meet their end, for I know their thoughts and deeds.
[Witchcraft, occultism, false religion, disobedience to God’s Laws, etc., all who do these things will die. Isaiah 48:22, Jeremiah 30:23-24, Revelation 22:15. Micah 5:12
Isaiah 66:18b-19 I am going to gather people of every tongue, they will come to see My glory. I shall put a sign on them and some of these survivors I will send out to the nations, to proclaim My Gospel among them. They will go to distant places that have not heard of My glory. [ Irrefutable proof that this happens before the Return.
Y’hovah’s people, righteous Israel, are gathered from all parts of the earth. 12,000 are selected from each of the 12 tribes and sent out to proclaim the good news of the coming Kingdom of God. Revelation 7:3-8 & 14:1-7, Isaiah 49:6.]
Isaiah 66:20-21 From every nation, your countrymen will be brought, on every kind of conveyance, coming as an offering to the Lord on His holy mountain. They will come to Jerusalem, just as the ancient Israelites brought their grain offerings. The Lord will select some of them to be His priests.
[Soon after the Lord’s Day of vengeance, all the Israelite peoples, including those who have lost their Israelite identity, will be motivated to emigrate to New Israel. Ezekiel 36:10-12, Ezekiel 39:25-29, Isaiah 11:11-12, Jeremiah 30:10-14. They will live there in great prosperity and peace for several years, until the Anti Christ comes to power. He will break his treaty of peace with Israel and take control of the country, placing his image in the Temple. This will start the 3½ year Tribulation period. An ‘elect’ group will be taken to a place of safety during this time. Zechariah 14:2b, Revelation 12:14. Then Jesus Christ will Return in His glory to reign for 1000 years. ]

Isaiah 66:22-23 As the new heavens and earth, which I am making will endure before Me, so will your name and descendants endure. Every new moon and Sabbath, all mankind will come to bow before Me.
[This will happen after the Millennium. Isaiah 54:9-10, Revelation 21:1-4.
Isaiah 66:24 As they go out, they will see the bodies of those who rebelled against Me, where the devouring worm never dies and the fire is not quenched. All mankind will view them with horror. Zechariah 14:12. Ref: REB, NIV. Verses abridged.

My comments in [ ] Bruce McKerras May 2011