It’s been 15 years since Thor hit theaters. It was just the fourth film in the Marvel Cinematic Universe, which has now notched almost 40 entries, and it introduced Chris Hemsworth as Thor and Tom Hiddleston as Loki , among other characters who’d continue to resonate throughout the Avengers movies . Back when it was released, one of Thor ‘s most intriguing qualities was its director: Kenneth Branagh, who was (and still is) better-known for Shakespeare adaptations than superhero blockbusters. In a new interview with Business Insider , Branagh reflected back on those early days of the MCU and the contributions he made but also looked ahead to the ending he’d like to see for the characters he helped shape. After the success of Thor , Branagh said Marvel wanted him to return for the sequel. He declined because he’d found the experience of making a Marvel movie “wildly exciting but super intense,” and he needed a break in the aftermath—especially since the studio wanted to plunge right into a part two.…