Quirrell storming into the trial when the majority of the audience believes him to be the one behind everything sounds quite like this story's style.
The trouble with this theory is that the arc is confirmed to last until chapter 84, and Quirrell being suddenly released from custody would be far too short of a resolution.
I suspect Harry and Co will come up with some sort of last-ditch effort during the trial, leading to some sort of awesome event like the previously suggested Trial-By-Combat (though obviously not that). I suspect Quirrell will play some part in the end, though.
Oh, and I'd like to predict that we find out H&C's identity during this arc.
It was mentioned that Fawkes was in the room. Maybe Harry threatens the chamber with having Fawkes teleport him to Azkaban and destroying all the dementors after demonstrating on the one in the room.
(The HPMOR discussion thread after this one is here.)
This is a new thread to discuss Eliezer Yudkowsky's Harry Potter and the Methods of Rationality and anything related to it. There haven't been any chapters recently, but it looks like there are a bunch in the pipeline and the old thread is nearing 700 comments. The latest chapter as of 7th March 2012 is Ch. 77.
There is now a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author's Notes.
The first 5 discussion threads are on the main page under the harry_potter tag. Threads 6 and on (including this one) are in the discussion section using its separate tag system. Also: one, two, three, four, five, six, seven, eight, nine.
As a reminder, it's often useful to start your comment by indicating which chapter you are commenting on.
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically: