Time: 39:26
Context: Slug turns into his giant form
Kaio: “I know him, Goku! Slug is a Namekian that left Namek, back before it faced extinction, just like the Kami of Earth did. He was sent as a baby to planet Slug. What’s more, he’s no ordinary Namekian! He probably doesn’t realize it himself, but through a mutation rare to Namekians, ever since he was born, evil has been the only thing to have grown in his heart. If that’s the case, his wickedness is incomparable to Piccolo’s, what with him having splintered off from Kami. The reason being that Slug is one hundred percent pure evil! He’s a Super Namekian!”
Goku: “A Super Namekian?”
Kaio: “Unless I miss my guess, not even Freeza, or perhaps even a Super Saiyan, can stand up to him!”
Pretty sad considering I just watched the film, but I can't recall if Kaio's last quote was to Goku or himself. Either way it feels unnecessary to shoehorn Freeza into that quote if the group didn't go to Namek.