I would be totally okay with the book ending here. Obviously the nature of it not ending here means there's a few things missing to make it a fully satisfying conclusion - no backstory for Saya being the main thing that comes to mind. As a 4 volume exploration into depression, anxiety, what it means to belong and be part of a group. How quickly it can turn on you, how quickly you can turn on it, and in general how shitty people can be - or not be at the very end when there's nothing to gain from being good. It's a pretty fucking great piece of fiction. i'm not sure volume 4 worked beat for beat every moment for me, but in saying what it's trying to say I think it's 100% a home run. That 21 issue run is definitely the best thing I've ever read by Remender. I love as well at the end that not only does Marcus walk off into the sunset, but the suggestion that they go to see the swans. There's times Remender beats these moments a little too hard on the head throughout the run but this one is perfect, and really shows how much Marcus has changed and learned - about who he is, what he wants and what he's had over the last year.
So I guess I'm just left wondering: Is Marcus definitely dead. I honestly still wonder if Maria is dead, the way they left off with her. Billy & Willie definitely seem dead as hell. A crazy savage introspective 4 volumes. As I mentioned, I'd be happy if it just literally ended but at the same time, it's exciting to see what's next. I wonder if Saya will be the *main* now or if it's new characters.