system
Given the following post, respond as if you're commenting on Reddit:
human
[Warhammer 40k] What happens if the Emperor dies, or alternatively comes back alive?

By comes back alive I don't mean that golden-throne pseudo-alive they got him stuck in.
gpt
His death most likely will also be his resurrection. He is born as a chaos god of good. It is argued that the throne is actually holding him back.

Also, it is the astronomican which is attracting the tyranid, they are all slowly headed for holy Terra. It might even be that a hive fleet is the thing that finally frees him: Nids make their way to the throne, gobble up what's left of the emperors physical shell, thus freeing his spirit.