The second sounds like weak Ni rational to me, but it's rather vague, so let's write it down as unrelated for now.
The third is where the oversimplistic let's-play-with-stereotypes attitude of this forum comes into light. Future = Gamma NT, plain and simple, why should we bother to actually think.
Thinking about the future itself says nothing compared to the how of it. For example, any E6 will have this fixation and appear pessimistic, yet it can manifest in many different ways, although probably depending on strong or weak Ni most. Strong Ni is more likely to be focused on certain pointlessness, uselessness of struggle against the inevitable, assuming things will end up badly anyway, though in no specific way (a game you can't win - every way is full of dangers), as they're more aware of the degree of future's predictability. Weak Ni is more about unshakeable belief about either future's unpredictability (we can't know what will happen and we can't prepare for it and we'll be unprepared and it'll end badly), or a specific worst-case scenario (it's going to happen like this and this, I KNOW it), depending on the situation, not a person - usually both approaches are visible in the same person.
Anyway, it's tentative S-creative from me, LSx > ESI. Not sure about Enneagram, but if it's 6, consider the above before settling on type.