In July 2009, Penn talked about the crossover process, stating, " My job is to kind of shuttle between the different movies and make sure that finally we're mimicking that comic book structure where all of these movies are connected . ..
12.
Sean Davies argued that the use of thesis and antithesis in the two-book structure of the " Descriptio ", presenting two sharply opposed views of the Welsh, was intended by Gerald as a display of his mastery of classical rhetorical forms, and that this vitiates the usefulness of the work as a historical source, since he might have been exaggerating differences for literary effect.