Exactly one week after Joss Whedon revealed that Quicksilver will appear in Marvel's "Avengers: Age of Ultron," 20th Century Fox announced that the same character will also appear in "X-Men: Days of Future Past" and will be played by a different actor. It turned out that Quicksilver is owned by both studios, but Marvel isn't allowed to mention the superhero's past, which includes his link to Magneto. But the big question is... Did 20th Century Fox add Quicksilver to its movie to somehow irritate Marvel? In a new interview, "X-Men: Days of Future Past" director Bryan Singer revealed that writer Simon Kinberg originally wanted Juggernaut in the movie. When Singer got involved, he swapped out Juggernaut for Quicksilver. But it wasn't to spite Marvel. "Quicksilver was always in our script," he continued. "Marvel were informed early on that I was using him. The way it'll play out in our movie...