The Walt Disney Studios crossed the $4 billion mark yesterday at the global box office in record time for the studio, running past its previous record last year by about six weeks. Not surprising this year, the studio was able to crow about its first billion-dollar summer, thanks in large part, to Marvel’s Avengers: Age Of Ultron, which has earned $1.4B. And they will, under the tutelage of Alan Horn, push it even higher as Disney/Pixar's The Good Dinosaur debuts for…