That really only leaves Mediterranean/Southern Europe, so it would be logical for the new continent to resemble Italy/Spain/Greece. Iron age concepts could be integrated in this scenario OSRS Accounts, I believe. Two cities could be built that resemble Rome and Carthage.
While they are not at odds, the two have been at one point in the past. The tensions are high. You will be attacked by a tough foe when your character attempts to travel on the road between them. There is the possibility of having one city "good" and another city "bad" and also have quests in which your character has to fight for the city that is good or each on the same level.
The region north of the cities is colder, wetter and more mountainous. The people who reside in this area would be similar to Celts. They are also considered savages among those living in the south. These people look a bit like Fremenniks however they're hunters-gatherers living in smaller communities. Also, they have a conflict with the two cities that lie to their south that are trying to expand in their territories. Jagex may want to raid the dungeons of this region.
I'm not sure the reason this is being forced on us, in a recent poll solo bosses got twice as much support. It's possible it could be an artisanal situation in which Jagex constantly polls players, and they repeatedly say no. OSRS requires a complex solo boss that is similar to the QBD 2012. Similar to the QBD, I mean it because it was originally an old combat system that was quite basic but had complex mechanics for its time Cheap RS Gold. The mechanisms shouldn't be the same. But, I believe the dragon shield could be a great drop.