Second post today about seasons 4 and 5:
Having the adults, particularly those connected to the kids being the main focus of the second arc would be a great direction for the story to take as it fleshes out some very important and beloved characters while not ignoring our main 5 kids as they and their arcs will still be connected, just not as front and centre as they were in the first 3 seasons. Another bonus is that these adults will have some interesting and important flashbacks set before our main 5 were born which will fill in some plot holes and add depth and complexity to this world and its character's.
Amaya: Her arc would see her becoming a parent as she is now Ezran's and Callum's closest living relative. She'll have to leave the border and move back into the castle so how does she adjust to this change? How does this situation affect her relationship with Ezran? Do they start butting heads? Does she ever return to the border?
A potential flashback episode could show us a much younger Amaya and Sarai and could also reveal the identity of Callum's birth father as she is the only one who can reveal this to us.
Runaan: If Runaan gets out of the coin at the end of season 3 then the next 2 seasons could focus on his recovery and potentially trying to adjust to life with only one arm. What does this mean for him? How has his time in the coin affected him? Will his views on humans change given that Ezran, despite knowing that Runaan was going to kill him is now caring for and looking after him? What about his relationship with Rayla? His arc I think would also include a reunion with Tinker so how would that play out?
Flashback wise he could have one which centres on his relationship with Rayla's parents and/or as people have been theorising, his personal reasons for believing that all humans are liars. Maybe he befriended but was then betrayed by a human when he was a rookie/junior assassin.
Viren: We could see his imprisonment, his growing relationship with Aaravos, his reunion with Soren and Claudia and the fall out that will almost surely follow and his eventual escape.
In flashbacks we could see how he met and became friends with Harrow and maybe even how this relationship evolved over the years and how Viren handled Harrow loving and having close relationships with others (Sarai).
Aaravos: His scheming with Viren and his eventual escape from the mirror.
Flashbacks would show his origins as well as his downfall and would reveal his true motived and plans for Xadia.
Tinker: Teaching Callum how to do magic while escorting him, Rayla and Zym to the Queen of the Dragons. We could also learn more about his connection to this world and the role that he plays. We could also see him mourning Runaan and comforting Rayla as she grieves. We could then see him discover that Runaan is alive and see him travelling to Kattolis to reunite with him. After this reunion we could see him reveal some important news from Xadia as well as see him crafting Runaan as prosthetic arm.
Flashbacks would depend on what we learn about him in season 3 but we could see how he met and fell in love with Runaan and his early days in Moonshadow territory.
Other potential characters to focus on might include: Gren, Janai, Sol Regem, the Queen of the Dragons and Rayla's parents (if they are also trapped in coins).