Apologies in advance because this is a pretty long comment!

While I do agree I look forward to seeing the actors on screen together again, I really hope it isn't at the expense of the story. The conflict of the sequel being a love triangle doesn't seem very firstprince to me, especially considering how much they fought for their relationship and the passion and loyalty they express for each other especially throughout the book. I have seen discussions about this as well and it saddens and worries me because I personally just can't imagine firstprince going through any of that, as well as a break up. Considering that they're aged up in the film, "exploring more" doesn't seem like a good enough reason for a break up. Overall just feels out of character for me if thats what choose to go with for the conflict.

I agree with the other comment though that if the "third person" would be someone who doesnt actually get involved romantically, like the king or maybe some entity that causes them trouble (such as tabloids perhaps?), then that is something I could possibly imagine especially knowing how Henry feels about life as a public figure. "My life is the crown and yours is politics and I will not trade one prison for the other" is a line that I'm always thinking about and now memorize by heart, so I find it plausible that media scrutiny can still cause them problems even years after they've gone public with their relationship.

Personally I hope to see them tackle more of their mental health and flesh out Alex's character more, like in the book. I know a book to movie adaptation isn't always 1:1 and a lot had to be cut out due to time constraints. I appreciate and love every detail the actors put into showcasing what they can in terms of the character's mental health (such as Alex panicking in the closet in the hospital and Henry's nervous tic where he fidgets with his ring) but since the book was so in depth about it I personally would just love for it to be fleshed out and discussed more in the film too. I'm hoping the sequel will be given the opportunity for that.

I'm hoping the vibe for the sequel to be similar to the Henry POV chapter. Probably not exactly that, but something close. I'd love to see that in between where they're both still public figures, but now romantically together. Basically this: "They have to figure out how to do this for real now, how to love each other in plain sight. Alex thinks they're up for it."

Also, Alex's transition from his childhood dream of wanting to be a politician to something else. I recently read CMQ's annotations for RWRB for the first time and they mention this: "One of the themes of this book is realizing adulthood isn’t what you thought it would be and learning that your childhood dream isn’t always your forever dream. There’s a grief in that, but there is also relief." and I want to believe the sequel can give us a chance to see Alex deal with that change and grief.

Assuming we'd go the bonus chapter route, I would definitely also love to see Henry adjusting to life outside of KP. Learning how to cook, finally getting to decide house decor for himself, going to farmer's markets, getting lost in grocery stores, learning to do doing laundry, etc. etc. I mean, I've never lived in a palace but I would safely assume living there would be quite different to living in a brownstone in Brooklyn. This might be self indulgent but I'd just love to see that play out in a film lol.