Yes, that's certainly true. I don't mean to say the verdict will bring any particularly helpful closure to any of us, but as far as concrete events are concerned, it is the ultimate closure. Our personal closures will have to come when they come, if they come at all. I consider Murray's trial the world at large's closure. After this, the media won't have any big stories on Michael-related subjects to tell (in my opinion, this is mostly a good thing).
What I fear most, however, is the world forgetting about him. This is all actually quite common as far as the grieving process is concerned, but the knowledge that it is "normal" does not make it any easier to digest. Theoretical knowledge can only take you so far. If the world was purely of the mind, nobody would ever have to die. This is somewhat of an issue with me, this whole death thing. I've never been afraid to die, if anything at times it seems quite the contrary, but I am terrified of those I am close to dying. They aren't very many, after all.
Even though it's been two years already, having to witness the trial kind of brings everything back to the surface. I know that Michael wanted us to change the world for the better, and for his sake we ought to heed his call, but what do we do with the incomprehensible garble that is our feelings towards the situation?
I know some people are coping with their sorrow via humour. We'll comment on how hot certain witnesses are, or DA Walgren and Judge Pastor. We'll cook up unsavoury prison situations awaiting Murray, or make fun of Chernoff's suits, and Flanagan's penchant for Lorazepam (Flanazepam). Some MJ fans even made parody accounts for the defence and the pros. basically to comment on the day's proceedings without the somberness an official summary would carry.
Strangely enough, trivialities like those really help me cope with the trial, and I think this is true for others as well. However, once it's all over...we'll just have our black Pandora's box of emotions to hold, and it will be wide open. Who knows what chaos will ensue. I think the worst is yet to come, personally. We've coped alright thus far, but once the extraneous people and the world's attention turns its sight from Michael, once we really get to feel what it's like for him to be gone, I think that will hit me hard.
I still, despite all logic, refuse to accept the loss. I talk about him mostly in present tense. Hell, I talk to him. I talk to the posters in my room to cope with the loneliness, and even if they never respond (it'd be a tad alarming if they did lol), I still feel as though he's there and he is listening. I know this is naught but fancy, but I'm not exactly in a position to favour rationality. Sometimes, when on the brink, you just have to unquestioningly do what works.
I think embarking on a mission to change the world will also help us establish his legacy. We'll do all we can in his name. But...like you said, he's never coming back, and it's so difficult not to step forward. There is work to be done here, after all.