This might be interesting:
Rev 20:11 And I saw a great white throne, and him that sat on it, from whose face the earth and the heaven fled away; and there was found no place for them.
Rev 20:12 And I saw the dead, small and great, stand before God; and the books were opened: and another book was opened, which is the book of life: and the dead were judged out of those things which were written in the books, according to their works.
Here we have a group of people who are being judged. They don't arrive from any specific place. They are simply there at the great white throne to be judged as if they died where they are being judged. Could it be these are the ones in Rev 20:9 that are killed by fire from God?
Rev 20:13 And the sea gave up the dead which were in it; and death and hell delivered up the dead which were in them: and they were judged every man according to their works.
After the first group are judged there are more that come from the sea and from death and hell. These were not already in the judging area like the first group were. We are seeing the dead being judged in stages. First a group that is not said to have arrived from elsewhere are judged. Then after that people start arriving from 3 places: hell, death and the sea. All of these imply deep dark places.
I believe that first group were the rebels of the little season and they died here upon the Earth and they were judged here instead of going to hades/hell which normally would occur. Then, those who are elsewhere are brought forth to also be judged.
This would explain why some are judged first, then others being judged afterwards from 3 separate places. So the last judgment has people who are from 4 different places:
1. Those already at the judgment area
2. Those from the sea
3. Those from death
4. Those from hell (hades)