If this is a prediction, I think you might be correct.
To receive a royal pardon, the prisoner needs to be serving his sentence. It's unthinkable that Thaksin will go to prison, but his sentence could be served in a medical facility.
After receiving his pardon (or compassionate release) he could then make a miraculous recovery - it's been done before, not just in Thailand.
(Kamnan Poh - Godfather of Chonburi, Ernest Saunders - Guinness share dealing scandal)