The Hellboy director is helming the project for Legendary Pictures, and provided several details about the film at Comic-Con International this weekend.
"It is my duty to commit to film the finest f**king monsters ever committed to film," del Toro promised, according to The Hollywood Reporter. "And secondly, I pledge to create the greatest f**king robots ever committed to film."
Del Toro also seemingly referenced Universal's refusal to commit $150m to his proposed H.P. Lovecraft adaptation At The Mountain's of Madness, which led the director to leave the project back in March.
"It's a miracle finding a company that has the energy, the ambition, the balls to make movies the way we want to make them," he explained.
Despite his enthusiasm for Pacific Rim, del Toro refused to divulge any real plot details, but did tease that the film would "answer everything curious minds might ask about monsters".
Several actors have already joined the cast, including Bad Teachers star Charlie Day, Sons of Anarchy regular Charlie Hunman and Thor star Idris Elba.
Pacific Rim is due to begin filming this September for an expected release on July 12, 2013.
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