When the dialogue was written the armor probably was not designed yet. Someone got the task of designing a shar priest and look at the top of the page: Complete with black circles and Shar tattoo. They could include a roll to recognize her religion.
Back to topic:
A god returning would be a possibility. But which one? And why does Selune to be absent?

Selune and Shar fusing? But why would they want to do that or need no followers, they already have lots.

I sometimes use thought experiments. I don't necessarily believe in every idea I post for discussion on this forum