Just for the record, this was written after watching ep. 9.
I'm sure this could be filed between speculation and wishful thinking but here it goes:
I agree with the previous poster that said Noah or perhaps someone else will be arrested, since the whole purpose of the series seems to be how some apparently random affair led to a crime some years later. My hopes for next season are actually on a trial, where the testimony from Noah, Alison, and the detective are exposed in a somewhat more 'objective' manner. I could even hope for a testimony from characters as Helen, Cole, and Cherry.
I actually attempt to make sense of the whole Rashomon experiment on a long run perspective. This might also be induced by the fact the show creators managed to run their previous show In Treatment, where they came up with a way to extend some storylines. So far we've witnessed versions of the same story given that Noah and Allison are being considered suspects of a certain crime and have made up different stories out of the same experience, and the show has never made any attempt to show any objective truth other than the detective's reconstruction (that by definition will be biased given the misleading testimonies and the detective's hunch that there was actually a crime).
For a first season of a new series I would consider it quite accomplished a lot, and it's among my favorites this year. Despite the criticism, I really enjoyed a series with a full set of characters that are not only making bad choices under the premise of being infatuated after a long time, they have provided each one's reconstruction of reality according to how they feel now and as a whole is an interesting statement about how memory and emotions are inevitably intertwined. Actually at the time of the interrogations both Noah and Alison seem as conflicted/unhappy/worried as in the beginning of the series, but time has passed and the story they tell the detective seems like some story you tell yourself to feel comfortable in your own skin.
So back to speculation, I agree with a cliffhanger at the ending of the finale that somehow closes the story (so far Noah has a motive to go after Scotty, and the finale might just give a better picture about it) but leaves space to more memories to be revealed so that we can become nearer a somewhat more "precise" truth.
