Andy Park, a Marvel artist who has worked on the likes of Avengers, Iron Man 3, Thor 2, Captain America 2, Ant-Man, Avengers 2 and Guardians of the Galaxy, shared the following piece of Nebula concept art on Twitter.
Karen Gillan played the character in the movie.
Had the most fun working on #GuardiansOfTheGalaxy My fav was designing Nebula! @KarenGillan2 was badass! #marvel