85) He contracts some Kryptonian disease and dies because he hasn't developed antibodies against Kryptonian diseases.
86) He dies fighting in the civil war.
87) The Kryptonians don't allow Clark to return to Earth. He tries to scape in a spaceship but it is slow and takes centuries to cross the space. By the time the spaceship reaches Earth Clark is already dead.
"My wife's love is what unites Krypton and Earth in my heart. Without it, without her, I truly would be in hell."
