There's a new book out now, the first full English translation of Revelation of the Magi
(RotM), by Brent Landau. In his commentary, he makes a few interesting points:
1. RotM explains the word "magi" to mean "silent prayer", rather than "astrologer" or "magician". Such an explanation of "magi" would not be consistent with a Zoroastrian-priest-theory of who the magi were. [And, I would argue, it would be consistent with an Indian-theory of who the magi were, India containing holy-men called "muni", "silent sages"; one of the Buddha's titles was "Shakyamuni", the silent sage of the Shakya people.]
2. The RotM said that the magi are descendants of Seth. The magi inherited from Seth a prophecy that a very bright star would appear one day, announcing the birth of the Son of God. Such a star had been previously hovering over the Tree of Life in the Garden, but Adam's sin caused it to vanish. [Muslims argue that the Garden of Eden existed in Sri Lanka, an island just south of India. Such an idea (if also found within ancient Christian sources) would also be consistent with an Indian-theory of who the magi were.]
3. The RotM relates that, in later years, after the ascension, the Apostle Thomas journeys to the land of the magi, the magi greet him and tell him of their experiences, and ask to be baptized, which Thomas duly does.
4. The RotM states that the magi came from the far-east land of "Shir" (which is unique in Christian writings, most of which say the magi came from Persia, Babylon, or Arabia).
5. The RotM equates the star of Bethlehem with Christ himself, again, something that no other early Christian text states.
The only known copy of the RotM is at the Vatican, written in Syriac, in 8th-century Turkey. The RotM, from internal evidence, is dated to, at the latest, the 4th century, likely even to around 300 CE.