This is just a speculation-based discussion on all of these individuals/ place.
The third & sixth event of YGGDRASIL players being transported into the N.W. most likely sent the goblin king to the other side of the 'current/mainland ' continent.
The Air giant warrior chief might be the player who was killed by the 13 heroes' leader. The Dragon emperor could be alive and he could be strong enough to be on par with the PDL and Zesshi as dragons grow stronger over time after all.
The Goblin king could have established a nation of goblins in the New World (N.W.) and they could be demi-human godkins, not just human godkins.
What do you think?