By reading several articles, I found these info on sites like DenofGeek, and TVline. Do you know anything more about the seventh season?
Theme(s): Despite not knowing anything about the main themes, the season will touch on the recent US elections with Trump vs. Clinton and is set in modern times, unlike Asylum or Freakshow.
Cast: Sarah Paulson, along with Evan Peters, Cheyenne Jackson, and Adina Porter, with newcomers Billie Lourd, Leslie Grossman and Colton Haynes. Lady Gaga will not return for the seventh season, but most likely the followings.