I'm SO SO SO glad this didn't happen. It would have ruined the show. Plus it wouldn't have been that believable either.
“There was going to be a reveal at the end [of the movie] that they were octuplets born in the late seventies or early eighties," Fogelman said.
Fogelman ultimately decided to make This Is Us a television show because he felt its plot would feel constricting in a two-hour film. “The reason I was struggling with [the film] wasn’t the plot; it was about these characters and how I didn’t want to beginning-middle-and-end them," he said. "I wanted to do this continuous story—which felt very much like the theme of the show.”