Random Trivia For This Title:
- According to Louis Leterrier, the final scene (Banner grins as his eyes turn green) was a deliberately ambiguous shot: it was meant to show that Bruce finally learns to control the Hulk (for a Hulk sequel) or will become a menace (as the villain for the film The Avengers).
- A blueprint of the sonic cannon at Culver University appears in the opening credits sequence, bearing the tile "Stark Industries," indicating that it was Tony Stark who built the cannons for General Ross to use against the Hulk. Stark himself appears in the film's last scene.
- The Hulk's origin in this film is a combination of the Marvel Ultimates comics (experimenting on Captain America's super-soldier serum) and [The Incredible Hulk] (over-exposure to gamma radiation in an experiment). Even the equipment seen is a close match to that used in the TV series, right down to the light sliding over Banner's face.
- Tim Blake Nelson's character, Samuel Sterns, gets The Hulk's blood in a wound in his head. His head starts to mutate and then he smiles. This is a foreshadowing of his possible role in the sequel as the main villain, The Leader.
- In the Bruce Jones Hulk comics, Betty Ross aided Bruce Banner as a shadowy contact under the alias "Mr. Blue." Mr. Blue appears in the film, but is revealed to be Samuel Sterns. The title Mr. Blue is also a reference to Tim Roth's crime film Reservoir Dogs, which featured Roth as Mr. Orange, and a Mr. Blue portrayed by [?] Edward Bunker.
- Although cut from the theatrical run, Captain America can be seen in the alternate beginning on the DVD and Blu-Ray. When the last piece of ice breaks up toward the screen, hit the pause button. There, frozen in the ice, is Cap with his shield.
- Tim Roth signed on the film because he was a fan of [The Incredible Hulk], as well as to please his comic-book-fan sons. On set, he constantly asked whether this would "be a cool shot" for his kids to see him in. He thoroughly enjoyed playing Blonsky, but found it difficult since to portray Blonsky's over-the-hill state he could not work out; but he hired a personal trainer to assist him in motion-capturing the Abomination's movements.
- Paul Soles who portrays "Stanley", the owner of the pizza shop, provided the voice for Dr. Bruce Banner in the 1960s [Hulk] animated series. The character's name may also be another tribute to Hulk co-creator Stan Lee.
- After the Hulk appears at Culver University, two students are interviewed in the news, named Jack McGee and Jim Wilson. Jack McGee was a tabloid reporter who attempted to track down the Hulk in [The Incredible Hulk], and in the comics Jim Wilson was a young orphan who befriended the Hulk.
- It took the VFX artists over a year to construct a shot where Dr. Banner's gamma-irradiated blood falls through three factory stories into a bottle.
- Two stars of [The Incredible Hulk] TV series have cameos. Bill Bixby is seen on TV in an episode of [The Courtship of Eddie's Father], and Lou Ferrigno portrays a security guard and voices the Hulk.
- The VFX artists think of Blonsky as "a guy who transforms but is not used to having these new properties; for instance, he's much heavier, so when he walks down the sidewalk, he's tripping because his weight is destroying the sidewalk."
- The Hulk, as portrayed in this film, was created through a blend of motion capture and key frame animation (by Rhythm & Hues). Hulk's VFX were carried out by Industrial Light & Magic, with its director Ang Lee providing motion-capture.
- Although director Louis Leterrier liked Hulk, he concurred with Marvel Studios that to continue the franchise it would be better to deviate from Ang Lee's cerebral style from the first film and focus on a more action-filled tone. He also believed that in keeping with Hulk's poetic feel, the VFX were mostly "a fluorescent-green guy who was simply flying around; he had no weight and was too smooth-looking," so he wished to make the film's VFX grittier and darker "and perhaps even a little scarier!"
- Hulk has a total of six words: "Leave Me Alone", "Hulk Smash", and "Betty".