The TVTropes Trope Finder is where you can come to ask questions like "Do we have this one?" and "What's the trope about...?" Trying to rediscover a long lost show or other medium but need a little help? Head to Media Finder and try your luck there. Want to propose a new trope? You should be over at You Know, That Thing Where.
Oddball in the Series for when it's actually a major but temporary shift in the formula
Fanon Discontinuity for just feeling like X installment doesn't feel like part of the series.
The Dark Knight one would be the result of Audience-Coloring Adaptation and Common Knowledge acting on you as a viewer- The Batman franchise has had two sides from the start- the campy Silver Age/Adam West form and the gritty version that made him the Trope Codifier for The Cowl and the Badass Normal superhero. (the original flavor, and the one that the franchise has leaned toward since the 80's). Earlier films leaned heavily to the former, the Dark Knight stuck closer to the standard Batman you'll see in comics and media where the writers have some Auteur License, like Batman: Year One and Batman: The Animated Series.
Edited by Scorpion451
For instance, I was watching Power Rangers in Space and its the most Power Rangers show. In contrast, a self-contained season like Power Ranger Ninja Storm while very good feels like a completely different show. I know after the Zordon era there's a self-contained season, however, they have ties to the Zordon era or the greater mythos. For instance, Beast Morphers brought Jason back.
For instance, Christopher's Nolan did his own version of Batman. While it was good it changed some status quo elements(Robin) as well as its more realistic tone that it didn't feel like a comic book movie at all.