They will be moving on:
So what does this mean for Season 2? Will Connie Britton and Dylan McDermott, who starred as Vivien and Ben, return to haunt the new owners of Murder House? Nope! "Those characters and those stories are done," creator Ryan Murphy told reporters Thursday morning. "Every season of the show will be a different haunting. Every season will have a beginning, a middle and an end. What you saw in the finale was the end of the Harmon house. The second season of the show will be a brand new home or building to haunt."
Keeping it vanilla for the second half of the season.