Neeson's character was killed off in 2005's Batman Begins but there have been several rumours about the villain's return in Christopher Nolan's final Caped Crusader movie.
And his appearance was finally confirmed in the production notes of his fantasy epic Wrath of Titans. The press notes state, "Neeson next appears in Peter Berg's actioner Battleship, and he also will be seen in Christopher Nolan's much-anticipated action thriller The Dark Knight Rises."
It's believed Neeson's villainous character wil be used in flashback scenes, with actor Josh Spence already confirmed as a younger version of Ra's Al Ghul.
Christian Bale, Gary Oldman, Tom Hardy and Anne Hathaway also star in the much-anticipated superhero blockbuster.