Over the last ten years, the Marvel Cinematic Universe has gone from being a handful of connected films to become an unrivalled pop-culture phenomenon spanning many different mediums.
And though the movies are more than enough to keep you up-to-date with its biggest events, the MCU is even more rewarding for those who delve much deeper, due to the sheer amount of cool details revealed beyond the limits of the cinema screen.
There’s so much going on in this universe that it would be impossible for each movie to address everything without them being three hours long. Instead, a lot of the time, that dangling plot thread you noticed, that lingering question you have, or that apparent continuity or world-building error has been addressed in another form, be that a comic-book, a TV show or even a director interview.
In short, a lot of big MCU reveals happened outside the main movies, and if you’re a fan of the franchise but don’t have time to keep up-to-date with everything it has to offer, then you could be missing out on some crucial bits of information.