Following Marvel Studios' appearance in Hall H at San Diego Comic-Con, MTV News' Josh Horowitz questioned Kevin Feige about the lack of an announcement
"We've got... we're reminding folks of all the fantastic characters that we introduced in Phase 4 and where those characters go and how they develop their own cliques."
It's also worth noting that, before the release of Hawkeye, actress Hailee Steinfeld was asked about the possibility of a Young Avengers team-up film in an interview with ComicBook.
No one can speak for Marvel Studios President Kevin Feige but him, but it appears like he just wants fans to get to know the new characters before they are all put together in one movie.
There are three major team-up movies planned for Phases 5 and 6 of the MCU, two of which are Avengers flicks, as well. An attempt to squeeze in a Young Avengers initiative someplace
In the meantime, he's hinted that further solo projects featuring some of the MCU's newest members may be in the works, and fans can always look forward.