The series was originally conceived as a companion series to Riverdale when it was in development for The CW; however, after the series was moved to Netflix, it was unclear if any connection would remain. In January 2018, CW president Mark Pedowitz noted that, "at the moment, there is no discussion about crossing over."[17] In March 2018, Jon Goldwater confirmed that the two series were "two separate entities for right now" but "would love it if they could figure out a way to cross over." Goldwater also felt there was a possibility for the characters to appear on future episodes of Riverdale, since Greendale had already been mentioned as existing on that series.[24] In the first season of Chilling Adventures of Sabrina, Moses Thiessen reprises his role as Ben Button from Riverdale.[25]
Regarding a proper crossover, Aguirre-Sacasa said in October 2018 he would "hate [for a crossover] to never happen" between the two series, adding that a potential idea for one would see the characters of Riverdale "hear[ing] about a haunted house in Greendale and try[ing] to break in and it's Sabrina's house". He also stated that since both series were already established, a crossover could happen in a standalone film with both casts, potentially titled Afterlife with Archie, based on the Archie Horror comic book series of the same name