Beliefs and the afterlife

I've been thinking about a basic question lately. A question that I've never seen voiced elsewhere but that seems elementary to forming an individual's world view.

There are a lot of different beliefs that various people hold about what happens after the human body has died. Some of these beliefs include simple decay of the body as the final process, reincarnation of an individual's soul into a new earth-bound life form, judgement by Jesus and disposition of one's soul to Heaven or Hell, absorption of an individual's life force back into an earthly pool of spiritual energy, the emergence of a massless and invisible soul set free to roam the earth indefinitely, judgement by Allah and disposition of one's soul to Paradise or Hell, rebirth into another universe, reincarnation as a more powerful being but in a massless and invisible form, etc.

Some people are unsure of what, if anything, will happen to them after their bodies die, but this isn't a view, just an uncertainty of the truth or likelihood of any particular possibility. But others place more weight on the likelihood or evidence for specific after-death options, and while while they might express less than absolute certainty that they know what will happen to them when they die, expect a specific outcome after their body dies.

So here's my question:

Does the belief that any particular person holds about what will happen to them after their body dies have any impact on turning that belief into reality?

If a man in India believes that he will be reborn in a different body after his original body dies, does his belief somehow impact the physical world even after his body has died? If I believe that a god named Jesus will judge my actions and beliefs about his existence and holiness and adjudicate my soul to a singular Heaven or Hell after my body has died, does my belief in Jesus before my death somehow sustain or bring into existence Jesus and his Heaven and Hell? 

If a woman in California believes that she has intrinsic life energy, is this belief alone sufficient to instantiate actual metaphysical life energy and perpetuate the existence of this energy after the woman dies? If a boy in the Philippines believes that after his body dies he will be reborn as a superhero-like demigod, does the physical and metaphysical manifestation of his belief have any chance of instantiating an actual superhero rebirth? If I believe that I will return as a leprechaun after I die, does some physical or metaphysical aspect of 'me' act as an agent to catalyze the creation of a leprechaun imbued with my soul at some point after my body begins to decay?

I suggest that the answer to this question is no, an individual's beliefs about the afterlife do not somehow will into existence a physical and metaphysical afterlife constructed according to the individual's views. Humans cannot through intellectual processes alone impact the physical world while we are alive, so why should our ability to will conditions into existence grow after our brains have ceased functioning, and in ways that operate outside of the physical universe?

The answer to this question leads to other questions. If our view of the afterlife doesn't have any impact on the reality of our personal disposition after our bodies die, and we are powerless to will our beliefs into reality, then perhaps it is in each man's interest to determine whether there is evidence that points towards a specific process and reality after his body dies. 

I posed this question to an acquaintance, and she told me she believes that the answer to the question is yes, that the details and fervor of her belief will catalyze the release of her life energy into a universal reservoir of life energy, and that my beliefs, whatever they are, will be realized and instantiated partly through the fact of my belief. I asked her whether she thought that her belief in the existence of a pool of spiritual energy could have any tangible impact of the disposition of my body and soul after I die, and she told me that she didn't think her views would have any impact on my reality. I didn't ask her whether she had given any thought to the possibility of creating for herself an afterlife fashioned according to her own desires.

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