For instance, Dave Bautista improvised Drax’s “Why is Gamora?” in Avengers: Infinity War.
The Guardians are a motley crew that lean into campiness, so Marvel could find a worse director than McKay.
On the other side of the coin, the improvisational style of acting that Adam McKay’s projects often encourage might lend itself to the Guardians of the Galaxy franchise.
While the movies are carefully written, there is some room for improvisation on sets.