Out of all the avengers that have multiple films, the Thor movies bring in the least amount of money. Only the first Captain America film and The Incredible Hulk did worse than the Thor films. Cap 2 and 3, All the Iron Man films, Guardians, 2 generations of Spider-Man, Doctor Strange, Multiple X-Men films both good and bad ones, Deadpool, and even Big Hero 6 did better at the box office. X_X Ant-Man finished with $200k less, and outside of that Cap and Hulk movie, the rest of the Marvel films below Thor are some of their absolute worst (Ghost Rider, Daredevil/Electra, and all the Fantastic Four films).
I guess they are trying to spruce it up with comedy.... hopefully they don't go too far. I'm not a firm believer in the wisdom that comedic relief makes a movie better.