>>82123995 (OP)
What comes after death is obvious.
Everything is material, including our conscious experience which arises from our brain activity. When we die, we decompose into the Earth and are recycled back into it. Our material will disperse throughout the planet and be reused by other organisms or exist as a part of the environment. Eventually we'll probably come back into existence as other organisms, or at least a part of what once was us will, through various stages of energy conversion from flesh to food or to energy to sperm and back to soil. We will return to the planet a million times over and have already done so.
This will continue forever, unless there's a nuclear war or the sun explodes, rendering life impossible, in which case we'll just stay as inanimate material.