Suggestions to impove the article 

There suggestions to improve the article. This is the comments from 

Lead

 Your writing has a lot of adverbs like "originally" "primarily" "mainly", these aren't necessary.  Sometimes they have a place but they also clutter up the prose and many of them can be removed.
 Third cable channel behind disney and nick.  Third in what?  Kids' programming?  It's not clear.
 Overall in the lead the writing is choppy and needs to be streamlined.  Here's an example:
"Since 2009, it began airing a small amount of live-action programming, specifically movies from Warner Bros. and New Line Cinema, both of which are also owned by Time Warner."  Rewrite like this, "In 2009 it started airing live-action programming, including movies from Warner Bros. and New Line Cinema."  No one cares that they're owned by Time Warner.
 See WP:LEAD for instructions on what should be in a good lead.  The lead should be a summary of the entire article and this lead should be enhanced to include every subject within the article (written in a summary style).

History

 The clean up banner is legitimate and should be addressed.  Usually clean up banners should be handled before the article is listed at WP:PR.  I can see a number of  templates in the following sections.  These should be addressed and the sourcing improved.
 As a general rule every paragraph should have at least one source, and more if there are multiple assertions.
 See WP:INCITE for reference anchor placement.  They don't go in the middle of the sentence but rather at the end unless the assertion is very controversial.
 The parenthetical reference in the first sentence is too detailed.  Give a few examples of what was acquired and leave it at that.
 Watch out for one sentence paragraphs.  These stubs are not acceptable at GAC.  Consider combining or expanding.
 Make sure titles are always italicized even when not linked.
 What is meant by the "Powerhouse era"?  What is powerhouse music?  

Programming

 This is a section with no prose.  Not good.  Sections with just a tophat are unnecessary.  Either add some prose or remove the section.  I think you fold in most of the programming info in the previous section.

Related projects

 Here is a section "Cartoon Network Universe: FusionFall" see above.

References

 The key to references is consistency.  Make sure every website ref has at least the title, url, publisher, and accessdate.
 You probably want to use templates like  to help with consistency.
 Deviantart appears to be a blog or discussion forum.  This is not a credible reference.  See WP:CITE and WP:VERIFY for instructions on credible references.  Avoid blogs, forums, chat rooms, social networking sites etc.

Overall

 As stated above the article needs a lot more referencing.  This will be a major sticking point if you want it to pass GAC.  * I would also seek out someone who can do a thorough copy edit.
 There isn't much about the financing of the channel, advertising revenue, demographics that sort of thing.  It would be nice to see some more information on these topics.
 This concludes my review.  Please contact me on my talk page if you have specific questions.  Best of luck to you.

I've fix the issue. Some movies were carried from 20th Century Fox, Paramount Pictures and Walt Disney Pictures which are not owned by Time Warner. I've improved some  it a little bit, but the article needs to be rewrite and remove any blog, user and fan sites which are not reliable. Any reliable sources can be added per WP:V and WP:RS. Remember,  is recommended. Good luck improving the article.  (Talk / Contributions)