@JLNobody,
I also think that the future is open ended, yet I also think that in some cases that which has happened can predetermine what will happen. But perhaps that puts it back in the (2).
I think of destiny as the inevitable result of our efforts. If humanity has some great destiny it is because we are working towards it. What will it be? Evolving beyond our world or self annihilation? I think it depends on which we put the most effort into.