In Johannine "agent Christology" the submission of Jesus to crucifixion is a sacrifice made as an agent of God or servant of God, for the sake of eventual victory. This builds on the salvific theme of the Gospel of John which begins in John 1:29 with John the Baptist's proclamation: "The Lamb of God who takes away the sins of the world". Further reinforcement of the concept is provided in Revelation 21:14 where the "lamb slain but standing" is the only one worthy of handling the scroll (i.e. the book) containing the names of those who are to be saved.
Why did Jesus accept Crucifixion.
sake of eventual victory