I wonder if we could have the dyad concept introduced in The Force Awakens. Maybe when Kylo and Snoke first speak via hologram, it could go something like this.
Snoke: There has been an awakening. Have you felt it?
Kylo Ren: The dark side…
Snoke: -And the light.
Kylo Ren: A dyad in the Force…
Oh I like that.