A crossover was planned between this title and "Invincible", with Grist drawing and Robert Kirkman writing, but their schedules have not yet allowed it. Jack Staff himself has already appeared in a cameo in an earlier issue of the title, at the memorial service for the slain Guardians of the Globe, and later appeared helping to defend the Earth from an army of other-dimensional Invincible doubles during the globe-spanning "Invincible" #60. A crossover with "Savage Dragon" was also planned, in which Dragon would have visited Castletown as part of a storyline in which he searched the world for his missing wife.