I like the idea of comparing Gary Mitchell's transformation to Jean-Luc Picard becoming a Borg. Both events happened against their will. Gary's mind was altered. His id was amplified. Every man has his dark side.
If Gary had survived (somehow Kirk knocked him unconscious and then the doctor was able to reverse his condition before awakening), I think he'd have been confined to a hospital for psychiatric treatment. If he was eventually declared "normal" again and discharged, he could have been reassigned back to the Enterprise (he had to have been a top notch navigator to get that position in the first place), and if not then to some other starship. I would expect the latter, as Enterprise couldn't wait (and we eventually got Chekov). It would've been great to see Commodore Wesley of the Lexington interacting with his navigator in "The Ultimate Computer", and it turning out to be Gary Mitchell.
If Gary had survived (somehow Kirk knocked him unconscious and then the doctor was able to reverse his condition before awakening), I think he'd have been confined to a hospital for psychiatric treatment. If he was eventually declared "normal" again and discharged, he could have been reassigned back to the Enterprise (he had to have been a top notch navigator to get that position in the first place), and if not then to some other starship. I would expect the latter, as Enterprise couldn't wait (and we eventually got Chekov). It would've been great to see Commodore Wesley of the Lexington interacting with his navigator in "The Ultimate Computer", and it turning out to be Gary Mitchell.