It's possible that:
* It's a fan-created idea: You may have come up with the concept yourself or seen it discussed in fan communities.
* It's an unannounced project: Sometimes, networks keep new shows under wraps until they're closer to release.
* It's a mistake: There might be a misunderstanding about the show's name or its intended platform.
To find out if the show is real or on its way to Cartoon Network, you could try these things:
* Search online: Look for official news articles, press releases, or social media posts from Cartoon Network about "Mix Master King of Cards."
* Check fan forums: Look on online forums and social media groups for discussions about the show.
* Contact Cartoon Network: You could try reaching out to Cartoon Network directly to see if they have any information about the show.
Keep in mind that even if a show is being considered, it may not make it to air. The process of developing and greenlighting new shows can be long and complicated.