I know, but why would he play game 5 and risked to get injured if he has no plan to stay?
I think everybody in the world - including KD - was shocked by the severity of the injury. At worst, he might have expected to re-aggravate the original injury. Luckily for him, he's KD, and not say Boogie Cousins. He will still get a full max deal while rehabbing for a season, while Cousins was forced to take a one-year taxpayer MLE.