Comicbook.com reports that the first look at footage of 'Avengers 4' was released by Marvel Studios at CineEurope on Wednesday. Reports add the event called for all attendees to lock their phones away, meaning those in the crowd who saw the footage won't be able to share what they saw on social media just yet. Sources say the reveal may have also been just promotional images or concept art as the the film is still heavily in post-production and do for additional shooting.