Comic book writer Ed Brubaker has great faith in Marvel's upcoming Captain America: The Winter Soldier.

In an interview with IGN, Brubaker revealed that he had been on set to see some of the movie while it was being filmed, and he was amazed by what he saw, specifically with the fight scenes.

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"It's the best movie that Marvel has ever made. The stuff I've seen from it, it also has two of the best fight scenes I've ever seen on film," he said.

Brubaker continued and predicted that the film would have a very profitable opening weekend, one which would make movie history.

"It's going to be amazing. It's gonna make a billion dollars. I got to go and be on set for a while and watch them film and stuff. It was just amazing. I couldn't be happier with how it came out," he said.

Brubaker followed up the interview by tweeting about his comments as well as warning fans that they don't the film to be spoiled for themselves.

"To all the many of you who've been asking me questions about the Cap movie and the Winter Soldier...I cannot answer them. I'm on NDA," he tweeted before adding, "Believe me, I'd love to answer all of them and avoid my actual work, but I am not allowed to, and trust me, you don't want the move spoiled."

He later added a new prediction about just how much money the film would make, and asserted that his opinions about the film should be taken as fact.

"Also, all my predictions about the movie are to be taken as fact and reported everywhere," he tweeted.

"Previously I said 'that movie's gonna make like a billion dollars' which I amend to 'that movie's gonna make like ten billion dollars,'" he later added.

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Captain America: The Winter Soldier arrives in theaters April 4.