Okay, so PD s11 finale theories:
Route A: they work real hard get to the killer and Voight but it's too late and he's dead/dying/dies en route to Med/at Med
Though I'm not so sure abt this cause we haven't heard about Jason's leaving (no, I am not up to date with who's already been confirmed to stay, sorry)
And if this happens, I think Hailey, or someone else on the team (prob Hailey), will kill the offender and it won't be the best of shoots so she'll be forced out of the department, or it'll take a toll on her and she'll take Petrovic's advice and make a change in her life (leaving cpd, and what I'm gonna say now is another discussion entirely but: she might not even wanna continue to be a cop and let's remember she has a college degree!).
OR
She'll just be really shaken by Voight's d3ath (which will be her losing another one she loved/who was her family) and will leave bc of that, she'll think that job is taking more than giving.
Route B (a happier and therefore less likely one, lol): everything will work out and Voight will be okay but Upton's good work as a team leader will be so praised that she'll get some sort of promotion and will have the opportunity (and accept, again, following Petrovic's advice) to lead another team.
OR
Even saving Voight, she'll kill the guy (or he will!! And she'll want to take the heat) and be asked to leave the pd/leave bc she can't leave like that anymore.
In summary, I think the episode, despite being a finale (which are usually more team-coded), will be Upton centric and will highlight those conversations abt mental health and change between her and Petrovic and that's gonna have everything to do with her leaving.
Another conclusion I'm reaching after e12 is that (total shocker, yes I know 🤡) there will be no upstead reunion/closure whatsoever, bc Hailey's departure is not gonna have anything to do with that. And even though I will most likely be over the moon if we get at least a phone call with Jay, I don't think that should happen bc as much as they did the upstead break up really dirty and bad and fucked up with all those unanswered phone calls and stuff, I think it wouldn't make any sense to bring him back or even up at all again, for obvious reasons: we haven't heard about Jay/upstead in forever now. Literally no mentions that either even happened on the show ever since Jo's first episode where she points out that Hailey just got a divorce. And even though Hailey's not healed at all after all she went through (not just Jay's leaving!!), it's like she has gotten some sense of closure on that part of her life and to bring that all up again would just be straight up cruel with her/them (cause whatever happens, I don't see them getting back together, so...). But this is a drama (read character-hater) show, so who knows, right?
Well, that's it, thank you for coming to my ted talk if you made it to the end of this rant. Bye, see ya next week!