Here's what I gathered so far reading the different pieces of the puzzle:
- Kim collapsed, rushed to hospital, North Korea signaled China for help
- China was prepared to send a team but it would take some time to get them to Kim's location
- North Korean doctors (one of them trained in China) feared the help would not arrive in time as Kim's condition worsened
- The North Korean doctors decided to operate on their own, one of them was apparently nervous to operate on the body of dear leader
- A procedure that should've taken 30 seconds to a minute took a full 8 minutes, leaving Kim in a vegetative state
- Kim being obese apparently also complicated the procedure
- North Korea once more asked Chinese doctors to help, hoping that they could perhaps do something to save dear leader
- The Chinese concluded that Kim was already (brain) dead and nothing could be done
- China has mobilized border forces and activated their agents in case Kim's sister turns to the US (after all she spearheaded the diplomatic efforts between Trump/Kim)
- North Korea has mobilized ICBM launchers during the last 48 hours
Tomorrow there is a big celebration in North Korea.
So they could announce his death and successor soon.