After closing an $11.7 billion merger in December, ViacomCBS is expected to unveil a new streaming service in late February that draws from strengths of its recombined companies, a source confirms to The Hollywood Reporter.ViacomCBS, led by CEO Bob Bakish, is planning an expansion of CBS All Access, the streamer that launched in 2014, that would encompass brands like Comedy Central, Paramount Network, BET, MTV and CBS News, among other offerings.