With Netflix now in control of the Sabrina spin-off series, it’s presently unknown whether or not Riverdale will still be a “companion” of the untitled Sabrina The Teenage Witch series.
A recent episode with a creepier tone than usual might’ve indicated an upcoming supernatural Sabrina connection when Archie saw a bloody deer, although that was likely tied to the mysterious guy who gave them a ride and had deer carcasses in his truck bed.
It seems likely that won’t be the case, but nothing has been ruled out at this time.
Sabrina Spellman did make a cameo in Riverdale in the form of a comic book cover, and Roberto Aguirre-Sacasa had teased in the past he was open to her appearing in the show.