Sandra Oh has been cast in ‘Can I Get a Witness’. The ‘Killing Eve’ star is to reunite with director Ann Marie Fleming on the upcoming sci-fi thriller. The movie is currently in development and is among four new projects being launched at this week’s American Film Market by the Canadian company Mongrel International. ‘Can I Get a Witness’ is set in the near future and takes place in a reality where, in order to save the planet, “death is everyone’s job.” 50-year-olds are making the sacrifice while teenage artists have to document it. Eric Mussolum and Jayme Pfahl are producers on the film whil…