For the record, I think this crossover idea has been done by now, given that the shows are well over fifty to sixty years old. But if this idea hasn't been illustrated yet then I could say it pleases me to be the first, but I won't.

Daphne Blake from Scooby Doo meets Kitty Jo, one of the Cattanooga Cats (not only a fictional rock band, but also a Hanna-Barbera property like Scooby-Doo). Together they think alike because they both love the color purple and like to wear green scarves and thus, they compliment each other. I think I went a little too much with the psychedelic background, but when it comes to late 1960s art, I suppose anything goes.

Enjoy!