Shang Chi and the Legend of the Ten Rings ends with a MAJOR mystery about the origins and purpose of the ten rings. In a post credits secen featuring Wong, Captain Marvel and a (human!) Bruce Banner, they determine that the rings are not chitauri, vibranium, or any other alien substance that Carol Danvers has seen. But they did activate a beacon which alerted Wong and the other sorcerers of Karmar Taj. So who are the rings calling?