Architect Ellerbe Becket, Kansas City, has been retained by Nets owner and Atlantic Yards developer Bruce Ratner, of Forest City Ratner Cos., to come up with a new design for the long-delayed and controversial Atlantic Yards basketball and entertainment arena in Brooklyn, N.Y.

Ellerbe Becket replaces Gehry Partners. Other key designers, New York City-based structural engineer Thornton-Tomasetti, and mechanical-electrical-plumbing engineer, WSP Flack + Kurtz, will remain on the project.