At some point in the WOT series we learn about the possibility of "final death". For example, from the WOT wiki:
Since Hopper died in Tel'aran'rhiod, he died his final death as the wolves put it, and will never be reborn or re-spun into the pattern.
The possibility of "final death", then, would seem to have serious implications for the future turnings of the Wheel. This character, in particular, played an integral role in helping Perrin be able to navigate the things that he needed to do in order for Rand to succeed.
Yet, if this character will never be respun, who will fulfill this role in future turnings of the Wheel? Similarly, we see Slayer kill a lot of wolves in Tel'aran'rhiod throughout the series. If this happens with every turning of the Wheel, it would seem that, eventually, there would be a turning of this Age with no more wolves. Furthermore, wolves played an important role in ensuring that the Last Battle was won.
This would suggest, then, that one turning of the Wheel will inevitably lead to the Dark One's victory
(e.g., without wolves, the Darkhounds would presumably be able to get to Rand and kill him before he is able to seal the Dark One's prison again),
yet it is suggested throughout the books that there is only ever a possibility of this happening. Do the metaphysical assumptions of RJ's universe really entail an assured victory for the Dark One at some point?