Pak has alternatively written for DC Comics, namely on both Action Comics and Superman during the New 52 Saga, co-writing the Doomed and Truth/Savage Dawn story arcs with fellow Star Wars alumni Charles Soule and Scott Lobdell, alongside Gene-Luen Yang and Peter J. Tomasi.
For BOOM! Studios, he has also written the ongoing John Wick comic book, in addition to his own original titles Kingsway West, Mech Cadet Yu, and Vision Machine.