[Hope]

Surah An-Nisa (4:157), which states:

"And [for] their saying, 'Indeed, we have killed the Messiah, Jesus, the son of Mary.' And they did not kill him, nor did they crucify him; but [another] was made to resemble him to them. And indeed, those who differ over it are in doubt. They have no knowledge of it except the following of assumption. And they did not kill him, for certain."

Allah chose an innocent man to replace Jesus...I want to know what happen to this innocent man 

No one died instead of Jesus.
You should check with your fictional writers