Known for popularizing the novelty of a shared cinematic universe, Marvel has expanded to the big screen, small screen and just about everything in between to chronicle its ever-expanding world. However, Secret Invasion's reception raises questions about its shortcomings and why such a milestone MCU production failed to surpass its antecedent. But it also comes with a realization that it lives in the shadow of Agents of SHIELD.
Source：https://www.cbr.com/secret-invasion-lives-agents-of-shield-shadow/
