Cast and crew are being sworn to secrecy about the fate of the X Factor winner’s character Aidan Connor.
But a source revealed: “Nobody will see this coming. Viewers are going to be absolutely stunned. It’s going to be a blow for the fans — but also a massive TV moment.”
Shayne, 33 — who won The X Factor in 2005 — made his debut on the ITV soap three years ago, playing the cousin of Kym Marsh’s character Michelle.
The handsome newcomer has since enjoyed a string of on-screen romances.
The source said: “Shayne has become one of Corrie’s most popular actors.
“He’s a huge hit with fans and has even won awards for his performances.”
The star will make his final bow next May.
The insider said: “Everybody wants Shayne leaving to be a huge part of the show next year.
“Bosses are working on it at the moment and have something really explosive planned for the character.”
Shayne launched into a career on the West End stage after releasing four studio albums following his X Factor triumph.
He appeared in shows including Rock of Ages and The War of the Worlds.
Last December girlfriend Sophie Austin, 33, who starred in Hollyoaks, gave birth to their daughter.