Hell is another name for the grave, which is the common end of all creatures.
My main purpose was to show that heaven would not be a place for unbelievers by even their own decision. If they were to enter heaven, they would want to leave because heaven is a place where God is glorified. And if you will not give God glory in this life, you are not fit for the kingdom.
The Bible does not tell us those who endure to the end will spend eternity in heaven, the Bible tells us those who endure to the end will spend eternity in the Kingdom of God, which will be on the new earth.
Revelation 21:1-4
Now I saw a new heaven and a new earth, for the first heaven and the first earth had passed away. Also there was no more sea. 2 Then I, John, saw the holy city, New Jerusalem, coming down out of heaven from God, prepared as a bride adorned for her husband. 3 And I heard a loud voice from heaven saying, "Behold, the tabernacle of God is with men, and He will dwell with them, and they shall be His people. God Himself will be with them and be their God. 4 And God will wipe away every tear from their eyes; there shall be no more death, nor sorrow, nor crying. There shall be no more pain, for the former things have passed away."
NKJV
My point in regarding aionas ton aionon is this phrase in mistranslated in most Bibles. In Greek "aei" means age and "ton" does not mean "and". Loss of opportunity does not equate to loss of possession. Those who never had to the opportunity to hear the Gospel or know the only true God cannot loose what they never had.