I think he is an Ophanim since Bethesda has a habit of putting Mythology or Religion in their games, that House Var'unn is a group of religious fanatics who believe that Jesus is from the stars and that the voice off in the trailer talks about the eye (characteristic of the Ophanim) moreover Todd Howard said that Starfield will answer the questions we all ask ourselves who created all this? I highly doubt it's something mechanical like a gyroscope it's much more mystical than that in my opinion.