Black Widow Screenwriter on the Big Taskmaster Change, His Quest for a Dr. Doom Easter Egg, and More

Black Widow screenwriter Eric Pearson discusses bringing Natasha Romanoff's backstory to the big screen, what the deal is with Red Guardian and Captain America, Taskmaster's transformation, and Easter eggs like Crimson Dynamo -- plus the Dr. Doom reference he really wants to get in a Marvel movie.