Mr. Buffett sits on the board of Kraft Heinz, a company he helped cobble together with a team of billionaire Brazilian investors. Kraft Heinz recently backed out of a potential $143-billion blockbuster bid for Unilever. Time will tell what Mr. Buffett's next elephant will be. Maybe if Berkshire itself gets cheap enough, Mr. Buffett won't have to look too far to go big-game hunting.