I believe there is also a tradition in the temple of Nechung (Tibet of course) that a door is sealed. According to tradition, the door is closed symbolically awaiting for the time when he will ascend the throne of the main Dharma Protector of our world. At that time, Nechung is said to have completed his duties and ready to ascend into the Buddha realms. - Extracted from Demons and Oracles of Tibet
How exciting!
Dear Big Uncle, TK and forum,
I found the below information from : Rene De Nebesky-Wojkowitz (1956). Oracles and Demons of Tibet: The Cult and Iconography of the Tibetan Protective Deities. London: Oxford University Press.
It said in CHAPTER XXII THE STATE ORACLE that:
The southern gate(1) is held closed in accordance with an old tradition that the chos skyong rDo rje shugs ldan is waiting at this entrance for the day to come on which he will be allowed to enter the monastery, to succeed Pe har as the chief dharmapala of Tibet after the former has become a ‘jig rten las ‘das pa’I srung ma and has vacated the temple.
I believe this book that was published way before the ban happened, has documented the prophecy that Dorje Shugden will become a deity we rely on in the future.
I’ve tried many times to attach the scanned texts of the original page and also the ground floor plan of nechung gompa in Tibet but something didn't quite work and it went onto error page. I will try again later.