There’s been a lot of back and forth about whether Marvel TV characters will ever appear in the MCU’s big screen adventures, especially Infinity War.
This past May, the Russos implied it was unlikely any TV characters would show up in Avengers: Infinity War because they were focused on “telling the stories of the characters that currently exist on the movie side,” but maybe they either changed their minds during the scripting process or simply want to offer a little hope to the TV fans who want to see certain characters, namely the Netflix heroes, appear in Infinity War, even if it’s just a cameo.
Although the Marvel movies and TV shows do take place in the same universe, they’re run separately, and because the movies are developed so far in advance, it’s harder to coordinate schedules and not mess up a project’s plans.