 The assets of ECW, which had folded after filing for bankruptcy protection in April 2001, were purchased by WWE in mid-2003.On May 5, 2002, the World Wrestling Federation announced it was changing both its company name and the name of its wrestling promotion to World Wrestling Entertainment (WWE) after the company lost a lawsuit initiated by the World Wildlife Fund over the WWF trademark.Although mainly caused by an unfavorable ruling in its dispute with the World Wildlife Fund regarding the "WWF" initialism, the company noted it provided an opportunity to emphasize its focus on entertainment.