Well, for one thing, I think Haibara will open up about her, "relationship," with Gin. & I think it will be that Gin raped Shiho. Constantly. Like, every night. I think he might've even got her pregnant once and, horrified at carrying the child of such a monster, decided to have an abortion. Than, at the very end, I think Gin will try to touch Ran which will cause Shinichi to lose his temper and start beating the crap out of him. He might almost kill Gin but then, remembering his moral code, (maybe with the help of Ran yelling at him to stop,) proceed to calm down and just have Gin arrested.
Is any of this possible?