The rebellious sons of God of Genesis 6 are still awaiting their fate.

"...the sons of God [Bene Elohim] saw that the daughters of man were attractive. And they took as their wives any they chose... The Nephilim were on the earth in those days, and also afterward, when the sons of God  [Bene Elohim] came in to the daughters of man and they bore children to them..."
- Genesis 6:1-4

"the angels who did not stay within their own position of authority, but left their proper dwelling, he has kept in eternal chains under gloomy darkness until the judgment of the great day" 
- Jude 6

"God did not spare angels when they sinned, but cast them into hell and committed them to chains of gloomy darkness to be kept until the judgment" 
- 2 Peter 2:4