Captain America's Enhanced Intelligence
Steve Rogers' infusion of the super soldier serum enhanced all of his attributes, including his intelligence. In the comics, his heightened cognitive abilities are prominently featured, yet the movies barely addressed this aspect. The MCU's Captain America is an incredibly intelligent leader and combatant, but the franchise largely ignored the potential impact of the serum on his cognitive abilities.
Steve Rogers (Chris Evans) in the Sokovia Accords meeting with Tony Stark (Robert Downey Jr.) watching in Captain America Civil War
Loki's shape-shifting power could have made him far more formidable had it been used more frequently. Although he employed it multiple times, the potential of this ability was underused in the MCU. The character's ability to take on the forms of others could have been a significant asset if explored further in the franchise.
Chris Hemsworth's Thor looking on as Loki shape-shifts into Chris Evans' Captain America in Thor: The Dark World
Taskmaster's Ability to Mimic
Taskmaster's ability to instantly mimic any physical act or fighting style makes her a particularly deadly adversary. Introduced in Black Widow, this unique ability was underutilized in the character's MCU debut. Hopefully, Taskmaster's power will be explored further in future appearances, as it has the potential to significantly impact the MCU.
Taskmaster in Black Widow crossing her arms
Iron Man's remarkably accurate analysis and targeting systems were used sparingly in the MCU, despite their potential to make him an incredibly powerful hero. The franchise overlooked this feature of his early suits, which could have enhanced his effectiveness in combat scenarios.
Iron Man's targeting system displayed in his suit in 2008's Iron Man
Heimdall's Super-Heightened Senses
Heimdall's super-sensitive sight and hearing could have been hugely helpful to the Avengers, yet the MCU rarely explored this remarkable ability. Despite his role on Asgard and within the Thor movies, the franchise underused his power, limiting its potential impact on the narrative.
Idris Elba as Heimdall in the MCU.
The MCU made a joke of Spider-Man's iconic ability, his Spider-Sense, by labeling it as 'Peter tingle' for comic relief. This underutilization of a crucial power in the character's skill set diminished its significance in the franchise.
Tom Holland as Spider-Man in Spider-Man: Homecoming looked surprised
Quicksilver's Super Speed
Quicksilver's super speed has the potential to be a game changer when used as part of the Avengers, yet his debut appearance was short-lived, and he never had the opportunity to fully employ this impressive power within the MCU. His death marked a significant waste of his abilities.
Aaron Taylor-Johnson's Pietro Maximoff aka Quicksilver in 2015's Avengers Age of Ultron
Black Panther formally introduced Wakanda to the MCU, showcasing its incredibly advanced technology, including healing power that could have prevented many MCU tragedies. However, this technology was underutilized in subsequent MCU narratives, diminishing its impact on the overall franchise.
Martin Freeman's Agent Ross is wheeled into Wakanda by Shuri, T'Challa and others
Vision's Intangibility
Vision's ability to phase through solid objects was underused in critical moments, leading to his demise at the hands of Thanos. Despite being incredibly powerful, the MCU opted to neglect this crucial aspect of his abilities, which could have significantly impacted the character's fate.
Vision using the Mind Stone in Captain America Civil War
Wanda Maximoff's most powerful ability, mind control, was overlooked in the franchise, with a focus on other aspects of her magic. This underuse of her reality-warping power represents a significant oversight in the Marvel Cinematic Universe.
Robert Downey Jr., Paul Bettany, and Chris Hemsworth as Iron Man, Vision and Thor attack Ultron in Avengers: Age of Ultron