Gillan will play the lead female villain in the story, according to the Hollywood Reporter. No other details were giving out at this time so keep a eye out for more news to come. Your guess is as good as mine on what character she will be playing. Someone for the current story or someone new.
Karen Gillan is best known for her role as Amy Pond on Doctor Who. Karen will be joining others already cast for the movie, Glenn Close, Chris Pratt, Zoe Saldana and Dave Bautista