While most of Marvel's blockbusters are based around established, much-loved superheroes, many were surprised when the less-well-known Guardians of the Galaxy went on to beat the likes of Iron Man, Captain America, and Thor at the box office. The sequel is now in pre-production, and star Zoe Saldana has tweeted a picture of her make-up preparation for her role as Gamora:James Gunn is returning to the director's chair for Guardians of The Galaxy Vol.