In this 2010 Marvel Cinematic Universe film, Tony Stark faces a new adversary, Ivan Vanko, who seeks revenge on the Stark family with his electrified whips. What is the title of this superhero sequel?

The superhero sequel described, where Tony Stark faces Ivan Vanko and his electrified whips, is Iron Man 2 (Review). Released in 2010, this film delves further into Tony Stark's life after he publicly revealed himself as Iron Man.

The primary antagonist, Ivan Vanko, also known as Whiplash, is a Russian physicist who harbors a deep-seated vendetta against the Stark family. His father, Anton Vanko, was a former partner of Tony's father, Howard Stark, and helped design the original Arc Reactor. However, Anton was deported for attempting to sell the technology, leading to a life of poverty and resentment. Ivan, inheriting his father's genius and bitterness, uses his knowledge to construct his own miniature Arc Reactor and a suit equipped with powerful, electrified plasma whips, seeking to dismantle Tony Stark's legacy and prove that Iron Man is not invincible (Review).

"Iron Man 2" is significant within the Marvel Cinematic Universe as it continues to build out the interconnected world. The film introduces key characters such as Natasha Romanoff, also known as Black Widow, and further develops the role of Nick Fury and S.H.I.E.L.D., directly setting up the "Avengers Initiative." It also explores Tony's personal struggles, including the health risks of his Arc Reactor technology and his complicated relationship with his father's past, adding depth to his character arc.