The former name for the block , The CW4Kids , is retained as a sub-brand to fulfill branding obligations for The CW per 4Kids 's contract to lease the network 's Saturday morning time slots , the Former Name will continue to be used until December 2010 when its simply known as Toonzai . The former name for the block , The CW4Kids , is retained as a sub-brand to fulfill branding obligations for The CW per 4Kids Entertainment 's contract to lease the network 's Saturday morning time slots .