It was a goal, something for the future. For now - they had to deal with the troubles being faced, to have that future to come back to. The fog usually seen at a distance for Hera comes around them now as Tidus, with that promise made, starts to focus on making a way back to the train for them. The colours of the void can be seen, but so can a golden, glowing path of step leading through it.

Something visible in the far distance, their way back - but first they'd have to travel the void to get to it, and its siren call to lure them off-course.