Although the discussion about the "Second Coming of Jesus" is far from the subject being discussed, I will briefly answer you.
According to the spirit of Ama, God is reducing people now. The 144,000 redeemed from the earth (Revelation 14:3) will be returned to earth. They will be born into new parents. The returnees will multiply while Satan will be imprisoned (Revelation 20:2). After a thousand years, Satan will be released (Revelation 20:7) to test the descendants of the elect, and the elect, and Satan will be here for a little season (Revelation 20:3), maybe about 500 years. I guess the end of the world maybe about AD 3700.