bro4bro saidWell as Metta said, that's not likely. The human brain is predispositioned to buy into faith-based belief systems. A specific region of the brain (the "God Spot") has been tentatively identified by researchers (and highly disputed, of course) as the source of our longing for religion.
Sadly, as people abandon traditional church-based religions, they tend to pick up other irrational, faith-based belief systems, some common ones being politics (left and right), environmentalism, animal rights... these things of course all have a basis in reality but are adopted essentially as surrogate religions by people who are more than willing to close their eyes to the reality and blindly buy into a convenient fiction, based on nothing more than some imagined utopian ideal.
Where the modern "church" went wrong was to become "organized" into a political force. Mother Teresa is an example what is Christ like and good about the church and the Televangelist and those like them is an example of what's evil about being organized. The misinterpretations and rewritings of 'morality' (bible) and secular humanism (constitution) have resulted in these political and control freak charlatans and their evil minds that have hidden behind the curtain for so many years. Its much like the Matrix programming, there is what you see or believe to be real, then there is reality
Again, all religions are set in paganism, although a certain religion (Christianity) continues to deny its pagan roots while pointing fingers at all other religions who may or may not accept their own pagan origins.
There is power (spiritual) in paganism so I don't think religions will disappear, eventually there wont be a need for formal "organization" when most people finally discover its secrets. It is the very nature of its secrets that those in religious power have held for centuries and don't want "lower life forms" to know about. The brains "Gods spot"?, yes the pineal gland also known as the third eye chakra. Until you have unlocked its power, most people are still in the dark. And those in powerful positions who know and use the secrets, wish to keep it that way. This is why Christians are the biggest hypocrites of them all.
I cant imagine a world where everyone knows the secret, this will be the 'end of religion' as we know it https://en.wikipedia.org/wiki/Paganism
It is crucial to stress right from the start that until the 20th century people did not call themselves pagans to describe the religion they practised. The notion of paganism, as it is generally understood today, was created by the early Christian Church. It was a label that Christians applied to others, one of the antitheses that were central to the process of Christian self-definition. As such, throughout history it was generally used in a derogatory sense.
— Owen Davies, 2011