In the late 1972, Conway and writers Steve Englehart and Len Wein crafted a metafictional unofficial crossover spanning titles from both major comics companies. Each comic featured Englehart, Conway, and Wein, as well as Wein's first wife Glynis, interacting with Marvel or DC characters at the Rutland Halloween Parade in Rutland, Vermont. Beginning in "Amazing Adventures" #16 (by Englehart with art by Bob Brown and Frank McLaughlin), the story continued in "Justice League of America" #103 (by Wein, Dick Dillin and Dick Giordano), and concluded in "Thor" #207 (by Conway and penciler John Buscema). As Englehart explained in 2010, "It certainly seemed like a radical concept and we knew that we had to be subtle (laughs) and each story had to stand on its own, but we really worked it out. It's really worthwhile to read those stories back to back to back – it didn't matter to us that one was at DC and two were at Marvel – I think it was us being creative, thinking what would be really cool to do."