Here, Johnson is basically reiterating what Oscar Isaac previous said in that Star Wars 8 tests its cast as the going gets tough.
Star Wars movies are designed to be for audiences of all ages, allowing people of multiple generations to get swept in an adventure.
Throughout his career, Johnson has become known for more serious-minded works like Brick, Looper, and some of the most intense episodes of Breaking Bad.
Star Wars: The Last Jedi writer/director Rian Johnson opens up more about the tone of his upcoming film, revealing that it keeps the lightheartedness of the previous installments in the saga.