Within the last month, EA has put out several job listings for Animators & Engineers to work on an upcoming multiplayer Sims title in Redwood Shores. As Rincon Del Simmer notes, the listings have three things in common. Multiplayer, Character Animations & The Sims.
These listings do not confirm any specific platforms (browser, mobile, PC.. etc), so there is no way to tell what type of Sims title this could be. Standalone game? The Sims 4? Something else entirely?