In this case whether it “works” is a matter of where to draw the line. The Zombie Preacher of Somerset that Good_Burning_Plastic linked had an animated body, with competent mental faculties and some psychological continuity with the former person. If he could become a zombie from a blow to the head, it seems quite plausible (for the purpose of writing fiction, not for making predictions) that the same could happen with cryonics.
In this case whether it “works” is a matter of where to draw the line. The Zombie Preacher of Somerset that Good_Burning_Plastic linked had an animated body, with competent mental faculties and some psychological continuity with the former person. If he could become a zombie from a blow to the head, it seems quite plausible (for the purpose of writing fiction, not for making predictions) that the same could happen with cryonics.