The phrase "an existing theme" is correct and usable in written English.
You can use it when referring to a theme that is already present or established in a particular context, such as literature, art, or discussions.
Example: "In this novel, the author explores an existing theme of love and sacrifice that resonates throughout the story."
Alternatives: "a current theme" or "a prevailing theme."
It's usually difficult to get excited about advertising technology, and countless "new" offerings usually tend to be just variations on an existing theme.
Edge always had some of those features, including its surprisingly useful Cortana integration, so this is mostly a continuation of an existing theme.
What's interesting about the scene too, besides the piano, is, thematically, we knew we couldn't really play an existing theme.
Think of each canvas as a jazz solo: a riff on an existing theme that is transformed by nerve and talent into something fresh and new.
Where new content was identified, that could not be labelled with an existing theme or subtheme, a new theme or subtheme was incorporated into the framework.
Fit your cake decoration with an existing theme.
In the episode's respective podcast, Lost's show runners Carlton Cuse and Damon Lindelof further discussed the time differential as part of an already existing theme regarding transport between the island and the rest of the world.
At Universal Studios, by contrast, the goal is to transform Port Aventura, which this season was renamed Universal Studios Port Aventura, into a destination park, perhaps adding a studio park to the existing theme park, as well as hotels and golf courses.
In 2000, Universal was involved in placing restrictions on the property through a 55-page private Master Declaration – to prevent any competing theme parks from popping up on the land about a mile and a half from Universal's two existing theme parks.
Underscoring the fierce rivalry between Spain's two largest cities, the regional authorities of Catalonia, whose capital is Barcelona, unexpectedly presented on Friday a casino and theme park project of their own, called Barcelona World, which is set to be built at a cost of 4.8 billion euros, or $6.1 billion, near one of Spain's most successful existing theme parks, PortAventura.
The WooCommerce plugin is designed to work with the existing theme library that WooThemes already provides.
