The story has since been backed up by wrestling and MMA news site Wrestling Observer / Figure Four Daily.
Probably not the most known of Marvel villains, Batroc the Leaper made his first appearance in 1966's Tales of Suspense #75. Batroc doesn't have any superhero abilities per say, but he's known for his mastery of martial arts - which makes St-Pierre's casting quite ideal.
St-Pierre has previously starred in Death Warrior and Never Surrender, both directed by Hector Echavarria.
Captain America: The Winter Solider will be the third film in Marvel's Phase Two before Guardians of the Galaxy and The Avengers 2. Returning to the movie will be Chris Evans as Steve Rogers / Captain America, Sebastian Stan as Bucky Barnes / Winter Soldier, Samuel L. Jackson as Nick Fury, Scarlett Johansson as Natasha Romanoff / Black Widow, Cobie Smulders as Maria Hill and Toby Jones as Arnim Zola. They will be joined by Marvel newcomers Emily VanCamp as Sharon Carter, Anthony Mackie as Sam Wilson / The Falcon, Frank Grillo as Brock Rumlow / Crossbones and Robert Redford in an as-yet-unrevealed role. The movie is set for release on April 4th, 2014.