(These numbers are estimates as of 2015, for more precise data you may go to any reliable source)
2.2 billion Christians
1.8 billion Moslems
1 billion Hindus
0.5 billion Buddhists
0.5 billion Chinese Traditional
.015 billion (15 million) Jewish
This leaves about 1 billion other Religious, non-Religious, atheists and remaining. These numbers add up to about 7 billion (which is the estimated population from Earth as of 2015). As humanity on our world UNIFIES (applying the Unified Field Theory) how will all of this Religious (and otherwise) diversity evolve?