One of the biggest talking points of Captain America: Brave New World, if you discount the transformation of Harrison Ford into Red Hulk…or the discovery of Adamantium on Celestial Island, is the return of Tim Blake Nelson as Samuel Sterns some 17 years after he was last seen being contaminated with gamma radiation in 2008’s The Incredible Hulk. But his appearance in the movie as The Leader brought a very different rendition of the character than some fans expected, and now director Julius Onah has explained in an interview with Variety exactly why the classic “egg-head” of the comic books had to be changed for the MCU.

Throughout the marketing campaign for Brave New World, while Ford’s Red Hulk took center stage – possibly a little too much by the time the movie was released – Nelson’s villain was seen only in one very fleeting, shadowy shot, which meant that...