I think that it'll be dramatic, but they'll eventually come to an agreement and move on. Anybody in Will's place would not just move on, I mean, he's been obsessed with her for a long time, and he'd finally gotten her. He's probably not going to let go that easily. He may get violent towards Jack and maybe even Elizabeth, but I doubt he would try to hurt her. When I watched DMC this morning, I noticed that while Elizabeth was getting into the longboat after chaining Jack to the mast, William helped her get down into the boat, making sure she got there safely, even after he had just seen her betray him. But then he gives her a cold look and asks about Jack. And in Tia's shack, he sees Elizabeth crying and he says "If there's anything that could be done to bring him back.....Elizabeth.." Then he is interrupted by Tia. It shows that he really cares for her and wants her to be happy. I think this may represent how Will might act towards Elizabeth in AWE. He may be angry, but he'll still care for her.
This is somewhat upsetting for me. Even though William is angry, he's still loving. Which means he'll probably forgive her in AWE, and Elizabeth is still in denial that she has feelings towards Jack, so she'll probably go with Will, leaving Jack to be free with the Pearl and all that stuff.
Even though I'm still 100% J/E, I've completely lost hope. A little while ago I was excited, and had so much faith that Jack and Elizabeth would end up together. Now I've totally given up. Who are we kidding? It's going to be W/E in the end.