Very little was known at the time at what led to inevitable demise of various theories did come to mind. One was the rival offering viewed on the as mentioned Nick Jr. and Disney Jr. brands with the other likely dealing with the content in general.
Tickle U aired lesser known shows and the fact that Warner Bros. Discovery didn't browse their archives at the time. They had A Pup Named Scooby-Doo, Krypto The Superdog and Baby Looney Tunes all of which never made it to the preschool block.
However people familiar with the matter had outlined that Warner Bros. Discovery had considered making Boomerang a preschool channel. This would be through Tickle U trademark and with the channel likely to be revolvant on its content.
Despite it not materializing, Boomerang did however did start airing more modernized shows in the later years like Krypto The Superdog and Gerald McBoing Boing. It wasn't long till Warner Bros. Discovery's next attempt at the preschool market, Cartoonito.
Cartoonito was a household trademark in the UK before expanding to other parts of Europe. It formed part of Boomerang's family lineup with shows like Baby Looney Tunes, Interstellar Ella and Lu Lu And The Bally Bunch before taking up the rest of the channel.