Okay quick theory. Nick will use Gabi to keep everyone at bay, so to speak. Gabi already got in Sonny's face about him going through her to get to Nick...so that tells me that she will be willing to do anything for him. Also that tells me that it will pit her and Nick against almost everyone else in Salem. Nick will use Ari in his favor to gain ground with Gabi and keep her around because he knows she's her weakness and her fear of losing Ari to Will and Sonny will play a pivotal role. Which again will anger alot of people. I have a feeling that these people will try to protect her and Ari so will go to an extreme to dispose of Nick.
By the way, i don't believe this whole amnesia act where he seems to have forgotten Gabi was also by the river that night and Sami and Kate only did what they did because of what she did to Nick. That will also come back and bite her on the backside. I can't believe she doesn't remember how easily he can turn on someone. Look at what happened at the lake with him trying to blackmail her about her past and trying to force himself on her. She needs to get a clue before she ends up getting herself and i fear her daughter into a very dangerous mess, one she won't be able to get herself out of, or clean up for that matter. What is that saying about everything happens in threes. She basically got away with the Melanie thing, the Nick thing, i have a feeling the third time won't be the charm and she will finally pay for all her past transgressions. Okay i'm done.