I was on Tumblr, and saw a theory (I forgot who it was, or id credit them) and it was like 'SJM really set this up for biggest betrayal ever'.

THIS IS ALL JUST MY OWM THOUGHTS AND RAMBLING! PLZ DONT TEAR ME TO PIECES IN THE COMMENTS FOR IT

I wanted to say my thoughts and add my own theories!

Why do I think it'll be Mor, Az or Amren?

Reason for each.

Mor: she's so secretive about what had happened with Eris! And when asked about it, she shut down. Eris even said (with context) that she wasn't saying the full truth! We don't know what her power is, for all we know she's manipulating the narrative! What is she hiding? And how far will she go to protect her secrets?

Az: The. Bonus. Scene. Why did he react that way? Why did he get SO mad about Rhys pulling rank? What does Rhys know? What does he see? Why would he say what he did? He was so mad, and if he truly does think what he said then who's to say he WONT betray his family for what he thinks is 'his'?

Amren: she seems power hungry, she already did betray them and she didn't get what she wanted so why wouldn't she do it again? She might. She was something even Rhys didn't know, and she never spoke about it. Do they really know her? Despite being 'friends' for YEARS it doesn't seem like she shared much of her self.