Former England cricket captain Kevin Pietersen suggested Andy Flower could replace Brendon McCullum as head coach after the Ashes defeat. Pietersen acknowledged past differences with Flower but believes he has changed and understands modern players, citing his success in other leagues. Pietersen's 'wild thought' comes as the ECB plans a review of the tour, with McCullum, team director Rob Key, and captain Ben Stokes potentially facing scrutiny.