This film incorporates elements from prior MCU stories ( #TheIncredibleHulk , #Eternals and #TheFalconAndTheWinterSoldier ) but you don't have to have seen them to understand this film. It provides a lot more context if you have seen them, particularly The Falcon and The Winter Soldier, but they tell you enough of what you need to know.
I thought this was a good first stand alone film of #SamWilson as #CaptainAmerica , establishing that he's not Steve Rogers, but he's Cap all the same. /2