You're thinking of Whiplash, not "Whiplash 2". There's only one Whiplash in the Iron Man franchise, and he was played by Mickey Rourke in Iron Man 2.
He was Ivan Vanko, a Russian scientist and son of Anton Vanko, who was a former colleague of Howard Stark (Tony's father). Ivan was driven by revenge against Tony and Stark Industries for his father's downfall.