In the first Phase of the MCU, the audience was slowly introduced to the main players of the universe before they all met up for their team-up movie in The Avengers. Marvel did a good job of giving most of these characters enough time to get at least a little established before they met up with the rest of the team, so the audience had time to get to know them before seeing them all interact with each other. It's much more interesting to watch a big team-up movie when one is already familiar with most (if not all) of the team, because at that point the viewer is already emotionally invested in the characters.
Throughout Phase 4, the MCU has been slowly introducing members of another famous team of theirs: the Young Avengers. The Young Avengers are a bunch of teenagers (most of whom have connections, familial or otherwise, to someone on the original Avengers) who band together and use their powers to fight for good, like any other super team. It's a fair assumption to make that Marvel eventually wants to give them a movie or TV show, as almost all of the main members have appeared somewhere in this MCU so far. These are the Young Avengers that have graced the screen so far in Phase 4, with some playing a bigger role than others.
The MCU Is Establishing A Theme For The Young Avengers
Kate Bishop is the Young Avenger who has made the biggest impression on screen so far, being one of the main characters of Hawkeye. The show was a great introduction to her character, and made a lot of fans excited to see her on screen with the rest of the team eventually. Kate is a skilled archer from a wealthy family, and her headstrong and stubborn personality makes her a perfect fit for a hero. She always admired Hawkeye as a superhero
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