Ceremony of the Unending Circuit
From Transformers Wiki
The "Ceremony of the Unending Circuit" would have been the event held by the Autobots every ten millennia to commemorate the passing of the Creation Matrix from one Autobot leader to the next, as prescribed by Autobot Law. However, the idea never got past writer Bob Budiansky's original written treatment and into the comic book.
References
- "Transformers, Additional Treatment Material 6/6/85," published in Last Stand by Titan Books