Mega Man 11's dev team consisted of roughly 40 people

Mega Man 11 may have been a big deal for Mega Man fans, but it wasn't a game that took up major resources for Capcom. That includes manpower as well. In an internal interview from Capcom, producer Kazuhiro Tsuchiya talked about dev team side.

Around 40 people. A rather small number compared to recent development teams. There are certainly benefits to a larger development team, but with so many people it means that some are unable to affect development across the game as a whole. With around 30 people it feels like you've got just enough staff for the project. It's very clear what aspects of the game each person is in charge of, so they can be completely sure of their goals and keenly feel responsibility towards them. I feel like the development team was the perfect size for a project of this sort.