Cross reference
Hebrews 2:5
5 For not unto angels did he subject the world to come, whereof we speak.
Hebrews 6:5
5 and tasted the good word of God, and the powers of the age to come,
2 Peter 3:13
13 But, according to his promise, we look for new heavens and a new earth, wherein dwelleth righteousness.
Revelation 11:15
15 And the seventh angel sounded; and there followed great voices in heaven, and they said, The kingdom of the world is become `the kingdom' of our Lord, and of his Christ: and he shall reign for ever and ever.