Panels from Marvel Feature #2 (March 1972), script by Roy Thomas, pencils by Ross Andru, inks by Sal Buscema, letters by Sam Rosen
Why they're going is a completely different question: because of the appearance of The Prince of Evil!
One thing I haven't mentioned previously here: as brought up by Marvel Feature, Rutland County is home to...Bald Mountain!
Oh, wait. I need to add something to the photo here:
Anyway, 'tis not Chernabog; it is his Earth-616 heterosexual lifemate, Dormammu! (We will now pause for everyone in the audience to declare 'Yo' mammo!')
Here's Rutland Halloween Parade Master of Ceremonies Tom Fagan, greeting those popular guest stars from Avengers #83, Roy and Jeanie Thomas! Wow, it was really cool of the script-writer for this story to fit them in, huh? It's good to have friends in the comic book industry.
Say, where are our title heroes...the
If you subscribe to the concept that all stories in all universes take place at the same time (and hey, isn't it our nature to try to link up every fictional character with each other...I'm lookin' at you, Phillip Jose Farmer), then consider this: the Defenders' battle versus Dormammu takes place at the same time Batman faces off against the Grim Reaper and Nazis. That's one busy Halloween Parade. But trust me...it gets even busier in 1972...the year of the first, albeit unofficial, DC/Marvel crossover! Stay tuned, gals and goons!