So as we know, the Ascians have sometimes noticed the WoL's soul being someone clearly very important in their original society. With several of the other worlds (reflections of the source) gone, and Ardbert's soul merging with the WoL's soul I think it means we are very close to becoming "complete" our fragmented soul restored.
The WoL's soul is now in theory 9 parts restored from the final 14 I believe (final 14... FFXIV... a coincidence?

)
Source + 13 reflections, 8 calamities/rejoinings.
It makes me wonder what that means for the WoL, I get the feeling that in Endwalker we may actually reawaken to some extent or full extent, becoming in a way an Ascian/Ancient as our soul nears the complete restoration.