I don't want to spoil too much, but that was basically the entirety of a novella which is the beginning of a plot line relevant to the final 3 books in the seri

I don't want to spoil too much, but that was basically the entirety of a novella which is the beginning of a plot line relevant to the final 3 books in the series. I don't know why they would include it if they don't have plans on continuing the show in some form in the future. It's not like there was any shortage of content in the mainline story to cover.