what happens after death?

This question is probably what makes so many people fear death--because there's almost no rock-solid proof of what happens after death. Obviously various religions can offer various solutions, but many religions have corrected themselves over the many years that they have existed, saying that they had misinterpreted certain things, etc.--so who is to say even their interpretations of what happens after death are wrong, even if their religion is based off of something correct?

Quite a complex and mysterious issue for sure.