The truth about Buddha, Jesus Christ, Krishna & Mohammed?

I read a Hong Kong sci-fi novel and it wrote about the 4 religious originators (Jesus, Buddha, Mohammed & Krishna) actually lived together in a faraway planet centuries ago. With their powers and philosophy, they were deployed to the different parts of planet Earth to convince as much people as possible, and for those who could follow their religious faith long enough, through the right way, til the end of their lives, will be qualified to immigrate to the planet after their deaths. And that planet, is called HEAVEN. Does that sound kinda logical now? Believers?