The Hollywood Reporter revealed Naya will voice the character Selina Kyle, who is also known as the iconic anti-heroine Catwoman.
The former Glee star's disappearance and accidental death shocked the world last July.
Naya was first reported missing after she rented a boat for her and her son Josey at Lake Piru in California.
Josey was found asleep in the boat alone hours later. He later told investigators he and his mum had been swimming together, but that Naya didn't make it back into the boat. He said he had watched her disappear beneath the surface of the lake.
Police believe Naya "mustered enough strength to save her son but not herself."
Sheriff Bill Ayub explained at the time: "We know from speaking with her son that he and Naya swam in the lake together at some point in their journey.
"It was during that time that her son described being helped into the boat by Naya, who boosted him onto the deck from behind. He told investigators that he looked back and saw her disappear beneath the water."
The 33-year-old's body was found after a five day search and an autopsy confirmed she died of accidental drowning.
The actress was laid to rest at Hollywood Hills cemetery Forest Lawn Memorial Park, a fortnight after her death.
Batman: The Long Halloween, Part One, is due to be released this spring or summer and will also include Supernatural's Jensen Ackles as Batman/Bruce Wayne.
It will be directed by Chris Palmer and the screenplay was written by Tim Sheridan.
Batman: The Long Halloween is based on the comic of the same title which ran for 13 issues between 1996-97.
Other cast members include Josh Duhamel as Harvey Dent and Troy Baker as Joker.
Chosen for YouChosen for You
Most Read StoriesMost Read