Seemingly out of the loop to the adjustment in question, Stephen McFeely was unaware of the revised line. It was up to the Russos to fill him in. “Well, there was a focus group after one of the test screenings,” explained Anthony Russo. “Somebody was commenting on something that happened in this section of the film, and he said, “You know those ‘space dogs’?” He referred to them as ‘space dogs.'”

The term seemingly tickled half of the dynamic directing duo, and they settled on adding it to the final film. Joe Russo elaborated, “He [Anthony] thought it was hilarious, so he incorporated it into Bradley Cooper’s read.” This minor tweak from a fan ended up sticking firmly in Rocket’s lingo moving forward, though, with Anthony advising that, “Now, Rocket refers to them as ‘space dogs’ when he’s shooting at them. He’s like, ‘Come on, space dogs!'” It’s not the first time a fan’s input has altered a line, of course. One classic bit of Marvel lore is how a Make-A-Wish visitor to the “Thor: Ragnarok” set came up with the iconic line, “He’s a friend from work!” This proves that to Marvel, fan feedback really does matter.

 One of Rocket’s funniest lines in “Avengers: Infinity War” was a late tweak suggested by a young MCU fan after a test screening.  Read More