The hitmaker has been persuaded to take to the stage on the ITV programme by judge Sharon Osbourne, who recently admitted her friend was a fan of her Over 25s category this year - although the 66-year-old has previously said he didn't like the series.
He also warned hopefuls attempting to forge a career on the show that they shouldn’t expect too much.
“TV vaults you to superstardom and then you have to back it up.
“Leona Lewis and Alexandra Burke are at the mercy of the next song they can get.
“It’s important that they write their own songs, so they’re not at the mercy of anyone.
“Songwriters today are pretty awful, which is why everything sounds the same. Contemporary pop isn’t very inspiring.”
Elton's apparent change of heart comes as ITV and the BBC are reportedly beginning to phase out their big weekend reality TV shows.