How about:

Josie and the pussycats meet the Jackson five. Set in the early seventies, it could have lil Michael hang out with Lil Archie...

Archie weird mysteries meet Scooby doo. Velma and Daphne team with Betty and Veronica, Fred with Archie, Scooby and shaggy with jughead and hot dog.. could feature Sabrina and the groovy ghoulies blamed for something they didn't do...