There are many different ways of looking at death. The idea that when you die, you just die...that isn't exclusive to atheist thought (and not all atheists look at it that bleakly either). The Ancient Anglo Saxons...of Beowulf thought when you die, you just die. Immortality was being remembered, so it was important to do good deeds so you would maintain immortality. And they had gods.SaneAmongInsane said:I am also just saying I went threw what you no doubt avoided from your parental upbringing the overall sadness and isolation brought upon by the idea of the atheistic death. Truthfully, that crippled me for many of my youthful nights to the point I really wised I was raised in a religion if only to deal with it later. It's a horrible experience to imagine if you're a child trying to understand the atheist view of death.
If nothing else, I'd like him to avoid that fear that I dealt with in my young youth every night.
Similarly, you could be an atheist and think that death is part of the cycle of life. The first law of Thermodynamics says that energy can neither be created or destroyed, so you could see death as merely a) natural and good and b) not final, but that the energy then goes to renew other parts of the ecosystem.
If you don't want you nephew to be lonely or isolated, then you can either tell him some religious story that you don't believe in, or you could explain it in way that doesn't make him feel isolated or lonely. But really, that is something his parents should do. And Batman, Superman, etc--none of those are going to help him deal with mortality.