Wallenda told Sarasota Herald-Tribune Tuesday that he has signed a contract with an unnamed cable network to broadcast the roughly half-mile (0.8-kilometer) walk.
In June, the 33-year-old Florida aerialist crossed a 1,800-foot (550-meter) span over Niagara Falls. The event was televised live by network ABC, which required Wallenda to wear a safety harness despite his protests.
The paper says his contract for the walk near the Grand Canyon specifies that he doesn't need a harness.
No date or exact location has been announced. Wallenda says he's in negotiation with two American Indian tribes whose reservations border Grand Canyon National Park.