What the hell/heaven happens on the other side?

Religion is something very interesting: although all religions praise love, peace, honesty, etc, which is kind of cool, when it comes to predicting or I should say prophesizing what happens after death they all diverge. Some claim there will be a paradise and a hell – basically if you did well on earth you’ll get all the good stuff, otherwise you’ll be punished endlessly for the bad things you’ve done (in other words, you’re screwed...). Ok, that’s fair. Others claim that you’ll come back to earth incarnated in some another animal (or plant perhaps?). And the list of religions and post-life theories keep going on and on. Thinking about this when I was taking a shower, I came to the following conclusion:
There are only two valid scenarios:
a) One and only one of these religions is correct
b) None of these religions is correct
Notice that the current existing religions have post-life theories that do not overlap with each other, so the possibility that two or more religions are correct is not valid.
Therefore, if (a) is correct, when we die someone on the other side will say: “ok, for those of you who followed religion abc, please take the stairways to heaven. Everyone else, please go straight to hell”. If (b) is the correct answer then that’s even worse: “ok folks, getting down please, everybody down”. Hum, kind of interesting and scary. Oh well, I think I had a long day today.