Will we get a syncretistic religion?

So you mean somethimg that is not that new in the history of the last 6000 years, but what has really become new since the modern Occidental times is the huge dimension, the technical development, especially the enormous acceleration of the technical development, and - as a result - the possibility that machines replace all human beings. Humans have always tried to design a new religion, but this time the designers will probably either integrate or exterminate all humans of this planet, and this will probably include a huge reduction of the number of the humans.