Like I said in my previous post, the most probable plot is for the much talked about Kang Dan to make an appearance. With there still being 2 trials left, she has appeared.
It remains to be seen what sort of wrench she'll throw into the works but now that she has appeared, I expect some confrontation between her and Sol-A.
The other clear development was that the congress man has been outed as the bad guy. This is a common plot where they reveal the ultimate bad guy a couple of episodes before the end so that you wonder whether he'll get away with it or not.
My guess is that Kang Dan appears in Korea and the congressman gets his just desserts. That would probably be the best ending after an exciting 16 episodes.
I can't see a bad ending for Sol-A and I think she an d Joon-Hwi become an item at the end. Just my guess.