It depends who the 'they' you refer to is.There's really no reason to stop the Novelvers if they don't want to.
If it's Paramount/CBS I suppose they could give that instruction, albeit extremely unlikely.
If you're referring to S&S, their management, the editors or writers, no, they can't decide to carry on. I believe it's mandated that spin offs adhere to on screen continuity. Our resident writers and editors might be able to illuminate this.