Randall Wallace has been set to rewrite Captain Nemo: 20,000 Leagues Under the Sea, director McG's vision of the classic Jules Verne adventure for Disney.

According to The Hollywood Reporter, Captain Nemo: 20,000 Leagues Under the Sea aims to tell the origin of Captain Nemo and his submarine warship, the Nautilus. Nemo is a mysterious but noble antagonist in the book, a scientific genius with a thirst for knowledge and a desire for revenge against the forces of imperialism.

The script previously was worked by Bill Marsilii and Justin Marks.

Wallace is squeezing in the "Nemo" writing gig before he directs "Secretariat," starring Diane Lane, for Disney. The racehorse drama is set to begin shooting in late September. Wallace, whose writing credits range from "Braveheart" to "Atlas Shrugged," is repped by WME.