A lawsuit filed by former Walt Disney Co. director Roy E. Disney that seeks to void the company's last board election will go to trial Aug. 10, airing claims that investors were misled about the search for a successor to Chief Executive Michael Eisner.

Delaware Chief Chancery Court Judge William Chandler III will preside without a jury. Roy Disney and another former director, Stanley P. Gold, say the board promised an open search when it already had decided to elevate company President Robert Iger. The search dissuaded the two men from running an alternate slate against the board, they said.

The company did not immediately comment.