I personally am already convinced that the next story chapter will reveal Kanaxai as the big bad behind everything. And I also feel like he'll be dealt with for "good" at the end of the next episode, though I hope not.
Also judging from what we heard in the story already, I wouldn't be surprised if the "testing" on Commander backfired. Gorrik basically picking their mind apart, digging in their traumas and memories for bait to lure the demon out. But the Commander snaps or gets way too deep into the hallucinations and sees an enemy instead of Gorrik/Rama and attacks them instead. Not kill, but definitely serious enough that it shifts the dynamic drastically. But maybe it would hurt Commander more than the unfortunate victim because it would send them into further guilt.
But either way, I hope to see that in the long run, Dragon's Watch and other people close to us finally realize that the Commander is not a tool, is not a weapon, is not invincible, but is actually a person with feelings, mental struggles, weaknesses and so on. I think our character is taken for granted, and I could totally see the demon arc changing that.
And if we're talking about experimenting with Commander's inner demons, I expect their death to be brought up. It's been very unused and that's despite the fact that when you think of it, the Commander basically died from burning alive. That and fighting for sheer existence in the Underworld must've not been very pleasant.
That being said, where I'm absolutely sure the story is going is to instances where the Commander will go into deeper traumas and panic attacks that might or might not absolutely break them but will also bring us some emotional Commander dialogue lines.
I know it's been said a few times already but I need to repeat it because the entire playerbase should be shouting it: the Commander voice acting in this episode was absolutely phenomenal! Especially the delivery from Brandon Bales and Steve Staley. Tumblr and some Discord servers are full of people recording the lines in the last instance and comparing the different races. I've never seen such hype about voice acting. Playing the story on my sylvari male felt so real and cut so deep. The voiceover team outdid themselves!
Lastly, reading this makes me so happy. Chul-Moo definitely needs more screen time, loved the dude's bickering with Captain Fa in Dragon's End. And of course, the unresolved trauma part. I've wanted something like Commander's inner demons and PTSD to be the main story plot for years now. Which makes me more afraid of what "the main plot" means. Does it refer only to this chapter and the one coming up in the summer? Or perhaps the story after that too? Because honestly, mental health is a serious issue that requires a marathon and not a quick sprint to fix. I think it would sit ill with many people who've had depression and trauma issues (myself included, so I am a bit biased) if the Commander was suddenly alright after such a short story arc.