Atheists definitely invited to participate here...you can just speculate theoretically, or something...which actually leads to a second question: What if it turned out that hell DOES exist, even if God does not?

As I happens, the Dalai Lama has already answered this question, according to the Vajra Dakini Nunnery (which is in Maine). His Holiness says: "I would much rather go to hell than heaven. I can solve more problems there. I can help more people there." 

And of course Buddhism does discourage the idea of a Supreme Being...anyway atheists and everyone invited to this Q!