Halcyon said:
So, from my point of view, finding a baptism ritual in the Maya does not seem too conclusive of them being taught it by the risen Christ.
Here is some stuff regarding Mesoamerican traditions of a bearded god visiting them and promising to return (the entire article can be found here -
http://text.farmsresearch.com/display.php?id=298&table=jbms :
Many of the symbols associated with Christ also belong to Quetzalcoatl and the Maize God, symbols that may appear both in pre-Columbian art motifs and in some later colonial literatures that do not seem to be Christian interpolations. Thus it is quite possible that features of the god Quetzalcoatl may be derived, in part, from Mesoamericans' remembrance of Christ's visit to the Americas. Those parts that fit the native traditions are these: a deity playing a role in the creation, "raising the sky"; a deity associated with the bread of life (a correspondence to maize); a deity assisting the dead; a deity shedding blood to save mankind; a deity dying on a tree (the Maize God's head hung in a tree); a deity resurrecting and being responsible for the rebirth of the deceased; and a personage of light who is associated with the sun.
We have already reviewed some of these attributes, and others are self-explanatory. There are further interesting aspects to explore. For example, other Christians equate some of the elements of the Maize God with Jesus Christ. In fact, the Maya of today find a strong association between their old god, the Maize God, and their new Christian god. A Catholic priest, Father Rother, wanted an ancient Maya symbol to represent God's aspect as the "bread of life" on the pulpit of a church in Santiago Atitlán, in Guatemala. Perhaps significantly, he chose the image of the Maya Maize God in lieu of an image of the Savior.
Bracketing mythological elements in the colonial manuscript
Leyenda de los Soles, one glimpses a possible original understanding of Christ's sacrifice, this descent to the spirit world, and his promise to resurrect all people. Although this account apparently refers to those who died before the flood, this aspect may have been introduced after natives lost their understanding of the gospel.
The writing of Juan de Cordova regarding the light that emanated from a powerful man, and the account in the Popol Vuh of the sun's being like a person may stem from Christ's visit to the Americas. These two stories do not appear to be Christian manipulations and are in keeping with Christ's visit to Book of Mormon peoples. Although 3 Nephi 11:1011 does not specifically say that the Lord descended from the clouds as a personage with light emanating from his being, it is plausible that he did. After all, he wore "a white robe" and, on the second day of his visit, radiated a brilliant light to his 12 disciples (see 3 Nephi 11:8; 19:25, 30).