And what Azula's footing would be in the next comic? Still dressed into that stupid spirit messing around? And what her supposed arc would end up with? Thrown into jail? If Yang is going by this plot-line then this is would develop into down right cheap and retarded character progress.
My guess is that Gene probably works backwards from whatever plot he wants to do. So, I highly doubt that he sits down and thinks, “What is the next step for Azula as I’ve laid out her character journey so far?”
It’s probably more like this:
“How do I make Mai’s father into a credible threat? Ooh, maybe he has ghosts helping him. How would Zuko stop the ghosts? Maybe Aang could help? No, Zuko doesn’t need Aang’s help! Zuko is the best! Clearly, the ghosts are just ninjas in masks. So why are ninjas dressing like ghosts? It’s all part of Azula’s master plan! Yes! That’s brilliant! That’s perfect!
“Wait, Azula’s master plan for what?
“Eh, I’ll figure it out by the time the script for the third part is due.”
Personally, I refuse to put more thought into it than he does.