It's fine, as long as the temperature stays stable and no further damage is done.
We're not going to revive their flesh.
Instead we're going to chop them off in large chunks. Suspend them in a kind of agar. Then laser off 2nanometer at a time. Scan the surface with 1nm resolution PiFM or better method.
That's going to yield many terabytes of image data that you can turms into a neural map of the entire nervous system.
Even mapping this data to today's LLM would get something roughly able to speak like the corpse. The better this data processing gets the more real the resurrected sentiences will be.