I would've preferred he was just left as John Harrison, one of Khans top people and by far the most intelligent & manipulative. The ideal choice for Marcus to thaw out and use. He was the one pulling the strings and Khan was just the figurehead. Or something..
A glimpse of Montalban frozen as well thrown in at the end!
"Oh my god, why would they do that when it was stated Khan was the leader and most intelligent and most dangerous one?! Worst film ever 0/10."