Comcast recently made a surprise billion bid to acquire Sky, a major satellite TV operator based in the U.K. In doing so, the world’s largest media conglomerate stepped into the neatly sewn merger plans of two other global entertainment behemoths — 21 st Century Fox and Disney. Months before, Fox had agreed to sell most of its assets to Disney, including a 39% stake in Sky, for .4 billion plus debt. Now with Comcast suddenly in the picture, the outcome of their agreement is unclear. “They are trying to throw a monkey wrench into the Disney-Fox deal,” said Wharton emeritus professor of business economics and public policy Gerald Faulhaber, who is a former chief economist at the Federal Communications Commission, which overseas U.S. telecom, broadcast, cable and satellite TV. “This will put the Disney deal on ice.” Wall Street didn’t like the development. Since Comcast’s bid was announced, shares of all three have fallen sharply.…