You know, I keep seeing headcanons that Lady Autumn and Helion are mates, but I would prefer if they weren't. That they just fell in love.
Especially if Lucien and Elain don't end up together. It would be a way for Lucien to see that it's okay to not have your mate, that you can still be happy. It would be a wake up for Rhys and Feyre a bit too, I think.