Speaking to TV Guide, Wilson said that Bailey's boyfriend Ben may be back, even though actor Jason George has joined new series Off The Map.
However, she suggested that the relationship will still be important for Bailey whether or not Ben returns.
"How many of us go through long-term relationships that end and then you have to sit there and figure out what to do now?" she said. "That's her journey... It was about that discovery and how it will change her personality."
Wilson recently revealed that she felt "energised" by the last season finale of Grey's Anatomy.