I forsee a terrible dispute when Ettinger and his two wives are brought back to life. Poor man.
Some folks will tell you that death is merely a transition to an alternate form of living. Some folks will tell you that if your cells are cryogenically frozen can get defrosted later. Both ideas are taken on faith, they may both be true, they may neither be true.
If someone reading this is pursuing a writing career in fiction I would be love to read a story about a bunch of souls, who have died, have had their mortal remains frozen, and now as dead people been able to see that there is an afterlife, but they can't go there because their mortal remains might be reanimated and they would go back, how they deal with it and what they do. Do they figure out a way to 'break' the cryonics system, allowing them to decay and move on? Do they go insane stuck between heaven and earth? Do they wander the planet vicariously living through other people's experiences. Maybe a TV series in there somewhere.
I live in an apartment building, but I haven't seen behind my neighbor's door. It could actually be a portal to Mars. It could lead to a few rooms consistent with the geometry of the rest of the building.
Not every pair of unknowns are equiprobable.
True enough, but the unknowns 'is there an afterlife' and 'can I be reanimated from frozen tissue' are sufficiently unknowable at this time to appear equiprobable to this reader.
They aren't equally true or untrue. There's more evidence cryonics will work than that afterlife-capable souls are real. The question is whether it's enough to be worth spending money on.
I like your idea about supernatural cryonics fiction though. I've considered writing stories like that myself. It doesn't have to be unpleasant for the souls; perhaps they are sitting in a camp outside the gates of heaven or hell, communicating with each other and sharing ideas. They could perhaps later carry messages back to the mortal world, granting empirical proof of the afterlife as soon as they are reanimated.