We earn a commission for products purchased through some links in this article. Black Widow's best Easter eggs and MCU references "Thank you for your cooperation." 11/07/2021 Black Widow has finally been unleashed in cinemas and on Disney+, marking the start of the movies side of Phase 4. Given that the MCU is now 24 movies deep, it won't be a surprise to know that Scarlett Johansson's long-awaited solo movie is packed with references to the wider MCU, including several Avengers jokes from her 'sister', Yelena Belova (Florence Pugh). But as with all MCU movies, its roots are in the comics so there are Easter eggs to be found for Marvel fans too, even if the on-screen version of certain characters and events aren't quite as they happened on the page.