In the aforementioned trailer for "Black Panther: Wakanda Forever," M'Baku (Winston Duke), leader of Wakanda's Jabari Tribe, says "His people do not call him general or king. They call him K'uk'ulkan, the feather serpent god" in reference to Namor. M'Baku suggests engaging Namor will lead to eternal war.
Kukulcan is, in fact, the name for a feathered serpent god in the mythologies of many cultures in Mesoamerica including the Aztecs, although his Aztec incarnation is better known as Ce Acatl Topiltzin Quetzalocóatl (per World History Encyclopedia). Quetzalocóatl is said to have been from Tollan, the capital of the Toltec civilization which were the predecessors to the Aztecs, and traveled east to bring important cultural innovations, vowing to one day return. While Kukulcan, aka Quetzalocóatla, and Tlaloc aren't technically the same god in Aztec mythology, Tlaloc is the god of rain and Kukulcan is known to be a bringer of rain. Therefore, the movie might be trying to fuse together the mythologies behind Tlaloc and Kukulcan. This could explain the character's ability to fly, which is somewhat of a mystery in the comics as neither of his parents possess that ability. It also explains the headdress the character has been seen wearing in images from the movie, such as on the cover of the November issue of Empire Magazine.
