March 17 (UPI) -- Warner Bros. released the teaser trailer for Dune: Part Three on Tuesday. The film opens in theaters Dec. 18. At the beginning of the trailer, Paul Atreides (Timothée Chalamet) and Chani (Zendaya) are discussing potential baby names. Paul suggests Ghanima for a girl and Chani suggests Leto, after his late father, played by Oscar Isaac in the first movie, for a boy. Later in the trailer, Paul asks his mother, Lady Jessica ( Rebecca Ferguson ), how his father protected the