So...armor pen runes?
So after looking over some of the assassin changes on the PBE right now, I noticed that armor pen is being replaced by "Lethality."
For those who haven't read about the changes yet: "Flat armor penetration's been changed to Lethality. They're pretty much the same thing, but the bulk of Lethality's penetration scales with your opponent's level."
While I've yet to actually see the changes in action (except for some Talon gameplay, parkour badassery OP), I had a thought: if Lethality is replacing armor penetration, what's going to happen to armor pen runes? Are they going to become Lethality runes?