UPDATE: Thanks to an official leak, it has been confirmed that this new slot is a molecule that will house a “likes and dislikes” system. See here for info.
During today’s Inside Maxis stream, Gurus confirmed that a new trait slot will be coming to The Sims 4 in the future. They did not directly acknowledge that this new slot is coming, but they did show the photo below and confirmed they will provide more details during the next Inside Maxis stream scheduled for May 25th.