With a first look of Adam Warlock being released via Empire, a first glimpse of Adam Warlock's look in Guardians of the Galaxy Vol 3 is finally revealed. However, he has a familiar look to him. Not because Warlock has showed up before, but because his look shares many characteristics with that of others in in the MCU. Although not distracting, it is noteworthy.
Warlock shares many similarities with other MCU characters, to the point it looks like they visit the same tailor. This could come across as inaccurate, as the universe is too big of a place for all characters to look the same. It doesn't have to be, but it has to appear as such to be convincing. This perception of accuracy informs the levels of suspending disbelief a viewer can commit to.
Historical accuracy
A form of perceived accuracy is historical accuracy, which can be described as the understanding or knowledge of historical development, whether that history is factual or not. In medieval settings, leading characters can immediately be discerned because they wear a pelt around their shoulders or no helmets, like in Vikings: Valhalla. Even fictional shows like Game of Thrones show this perceived historical accuracy as well (1), as it's perception can be related to understanding of real-world historical patterns.
This accuracy can be extended to Guardians of the Galaxy Vol. 3. It is part of a massive universe, which is why it can be distracting seeing Adam Warlock, Captain Marvel, Ms. Marvel, Shang-Chi, Proxima Midnight and Captain America all wearing simiar clothes. They all have similar suit padding, similared stitched suits, and similar materials, while they're from the widest corners of a presumably diverse universe where each part of the universe has had it's own historical evolution and thus different fashion.
Other (in)accuracies
Contextual accuracy is concerned with understanding the context in which a story takes place. In Rings of Power it makes sense mixed societes exist, as migration is common. Whereas in Wheel of Time it doesn't, except for at the Tower. Nor doesn't it feel accurate when characters with no access to showers or clean clothes still manage to somehow look clean tidy all the time. In House of the Dragon, even though it is fictional, it draws on many architectual styles from realworld history to make it feel contemporary to the world of Westeros (2).
Textual accuracy is based on the accuracy of texts itself. Linguistic accuracy is the understanding of linguistic development, like why the kids in Avatar: Way of Water use human words like ''bro'' in alien languages. If the dialogue feels more natural to it's context, is more easy to relate to the characters speaking it. Avatar is also an example of perceived musical accuracy. The music is made to sound tribal and alien, so that the viewer is informed of what they see, even if it's inaccurate to the lore of music within Avatar (3).
Situational accuracy
This situational accuracy -where what is seen on-screen is perceived as accurate because it lines up with the viewers' assumed knowledge- only has to make enough sense temporally or spatially and be consistent within the context of the surrounding world it follows from. In futuristic settings, faster-than-light travel is acceptable, whereas covering large distances in medieval settings should take much longer, and not just hours.
Being perceived as accurate, whether it's in fictional worlds or not, is important so that the viewer can suspend disbelief long enough to enjoy it. Or maybe even relate to it if it looks familiar, like jobs similar to realworld jobs. However, it's more difficult when things look out of place, like a gold-skinned character from all across the cosmos wearing a suit similar to a girl from Jersey.