THE ESSENCE: Whither Mr. Six? The question looms large for Doner as the agency goes into 2006. Dan Snyder, who's on record knocking the agency's work for the amusement park, is now calling the shots at Six Flags. The campaign's future, if not the very relationship, is a big question mark. As far as 2005 went, the agency slowed from its breakneck new-business pace set in 2004. While the independent had some good wins-Electrolux's Eureka brand, Food Network, direct for LensCrafters among them-it didn't land a big one like 2004's Circuit City. It also split with Hibernia and B.F. Goodrich.