I’d go so far as to say that general feelings about the movie are spoilers, so Vader being in the movie is most definitely a spoiler.
According to that logic, non-spoiler thread is completely useless as there is nothing to discuss.
Speculation is what I think the non spoiler thread is for.
Speculation falls under “general feelings”.
No, it doesn’t. A general feeling is something like “There’s a twist.”
Stop embarrassing your self.