They hinted at big plans for Ventress. That can either be an adaptation of Dark Disciple down the line, or maybe something in the Maul series, or Ahsoka, or something completely different. But it does not end with the Tales show, I am pretty sure.

Personally, I think it would be odd to create the new Quinlan model for just one scene and I am skeptical that they would create that whole sequence on Dathomir just to keep continuity with a book, when they are happy to retcon printed media in other cases.

So my money is on an Adaptation of Dark Disciple in some form. That’s why I would wait just a little bit with a project like this.