In the beginning, there was the empire. The Enemy had to be driven out of it. Season 1.
Halfway there, we got a plea for help from a land across the sea. Season 2.
Then, for some idiotic reason, season 3 takes place in an alt universe, rather than it happening across the sea, like Atlantis.
So, season 4, why is it happening with Victorian age characters, and is there any explanation to how it even begins and why?
As for new Quests, well, easy. Have Atlantis raise the alarm, because, say, the Pirate family is raiding coastal family or the samurai family. Heck, maybe even the Atlantis family.
Speaking of the Samurai family, now is your chance to show us that the girl in the red kimono survived, thanks to the medical care of the holy healer girl. (I am not good with names).