From the look of this trailer, it seems like this could be the last season of the show. No mention was made about Spencer and Heidi's fake marriage or fake divorce, but we were teased with tears and an embrace between Lauren and her former BFF, after Heidi shows up at L.C.'s surprise party.
Lauren goes to a tarot card reader, who had obviously been primed by producers on the first four seasons of the show so she'd know exactly what to say.
Also, we get to see that fist fight between Spencer and his sister's boyfriend.