"Markus reiterated this in January 2015, but acknowledged that it would be harder to keep continuity with the short the longer they made the series.The first season introduces the origins of the Black Widow and Winter Soldier programs, which both appear in several MCU films, while the second season shows the discovery of the Darkforce (known as Zero Matter in the series), which previously appeared in "Agents of S.H.I.E.L.D."