What about Hot Dog?
I wonder if they are other characters like Moose's girlfriend, Midge. She could be his beard. And what about Hot Dog, Jughead's dog? Or Veronica's father? I think when they add Sabrina, they should make her a Wiccan, so the witch thing would be more grounded in reality. I look forward to Big Ethel's appearance as well.
I hear they are eyeing Josie and the Pussycats for a spinoff if the show is a hit.