As an embattled boss retires, a celebrated one clarifies successionA COMMON complaint at the height of the crisis was that too few Wall Street bosses were being forced to fall on their swords. With the fog of war clearing, exhausted leaders are rushing to leave the battlefield. James Gorman will succeed John Mack as head of Morgan Stanley on January 1st, when Wells Fargo’s chairman, Dick Kovacevich, will also retire.