Yes interesting point seeing as Satan created the first city, I believe that rulers of all nations are somehow bound to satan in some way shape or form. There is imminent destruction with regards to the ruling of a nation. However the angels do return to save humanity at the end.
All of humanity will not be saved, but only those who are of faith in God and Christ Jesus who are His own through the Spiritual rebirth and indwelled with the Holy Spirit, John 3:5-7; Romans 10:9, 10.
Matthew 24:29 Immediately after the tribulation of those days shall the sun be darkened, and the moon shall not give her light, and the stars shall fall from heaven, and the powers of the heavens shall be shaken:
Matthew 24:30 And then shall appear the sign of the Son of man in heaven: and then shall all the tribes of the earth mourn, and they shall see the Son of man coming in the clouds of heaven with power and great glory.
Matthew 24:31 And he shall send his angels with a great sound of a trumpet, and
they shall gather together his elect from the four winds, from one end of heaven to the other.
John 5:26 For as the Father hath life in himself; so hath he given to the Son to have life in himself;
John 5:27 And hath given him authority to execute judgment also, because he is the Son of man.
John 5:28 Marvel not at this: for the hour is coming, in the which all that are in the graves shall hear his voice,
John 5:29 And shall come forth;
they that have done good, unto the resurrection of life; and they that have done evil, unto the resurrection of damnation.