General
In the trailer, we see this suspiciously Nezarec-shaped tormentor:
We know that returning enemies (Savathun/lucent brood) and items (Aegis) will be in the Pale heart, especially since a big part of it is our memories basically come to life. We can likely expect a ton more from the past 10 years to be tossed in like bosses, secrets, etc.
At the end of RON, Nezarec tells us that he isn't really dead; he simply lives on in memory:
My memory will never extinguish. In your calmest moments, your deepest slumber... you will remember me, guardians.
What if instead of the Nezarec we see in the Pale Heart being a memory of him, it is actually him reincarnated? What happens when you have a living memory and you go to somewhere that brings your memories to life?
