who launched the above mentioned channel?
CBS and Time Warner
The CW
CBS and Time Warner 
when does the flash show up in arrow December 2, 2014 is this a film? It is an Arrowverse crossover event what do you mean by this first term you used in your answer? The Arrowverse is an American media franchise and a shared universe that is centered on various interconnected television series when was it launched? October 2012 can you name any two of such tv series? "The Flash", "Legends of Tomorrow", "Supergirl" does it also support audio series? Audio studio Serial Box is currently developing an audio series for it who developed the above crossover event we talked about? UNANSWERABLE where was it aired? On The CW who composed its music? Blake Neely can you name any other work of his? "Everwood", "Pirates of the Caribbean" films is the latter based on any novel? There is a novel written for adults who wrote it? UNANSWERABLE
wiki:10785005
The CW [SEP] 2006–2011: Launch and early struggles
Like both UPN and The WB, The CW targets its programming towards younger audiences. CBS and Time Warner hoped that combining their networks' schedules and affiliate lineups would strengthen The CW into a fifth "major" broadcast network. One week before the network's official launch, on September 11, 2006, a new, full version of the network website was launched; the website began to feature more in-depth information about The CW's shows. The CW launched with a premiere special / launch party from the CBS Paramount-produced "Entertainment Tonight" at Warner Bros. Studios in Burbank, California on September 18, 2006, after a repeat of the tenth-season finale of "7th Heaven"; the same schedule was repeated on September 19, with the sixth-season finale of "Gilmore Girls" airing in the second hour of prime time.