In the comic books, Werewolf by Night and Man-Thing were members of the original Legion of Monsters, along with Morbius and Ghost Rider.
At around 16- and 31-minute marks the "cigarette burn" effect appears in the top right corner of the screen. This used to appear in old films indicating the change between reels on the film projectors.
This is Marvel Studios' first Halloween special.
This is the TV special directorial debut of Academy Award-winning composer Michael Giacchino. Giacchino had previously written the scores for Doctor Strange (2016) and the Jon Watts-directed Spider-Man trilogy for the Marvel Cinematic Universe and was a co-composer on Thor: Love and Thunder (2022). He earlier directed one short and one animated series episode.
The monster named Ted is better known to comic book fans as Man-Thing.