On September 18 2013, Wikileaks released a mature version of the complete script to the public, because "the film is, from WikiLeaks' perspective, irresponsible, counterproductive and harmful." They also published a "Talking Points" memo "because it represents a frank internal appraisal of [the film] and what is wrong with it."
On 7 October 2013, The Guardian ran a piece by journalist Ian Katz about the experience of being played in this movie by Dan Stevens. He pointed out that colleagues of his who were much more involved with the WikiLeaks revelations did not feature in the film, but dryly wrote that it was flattering to be played by an "Aryan pin-up".
According to a Dec. 2016 article in 'Der Spiegel' magazine, the director Bill Condon visited their publishing house and took notes for the production design. The location was recreated in a studio in Brussels, but they made the rooms much bigger than the original ones are. Details like the old 'Spiegel' covers hanging on the wall (showing Albert Einstein etc.) are authentic, but the real ones are much smaller than the giant reproductions in the movie.
Five actors in this film play characters associated with Marvel productions. Benedict Cumberbatch (Doctor Strange), Daniel Brühl (Baron Zemo), Stanley Tucci (Dr. Abraham Erskine), Anthony Mackie (Falcon) and Dan Stevens (Legion).