Comcast is moving forward with plans to spin off its NBCUniversal cable television networks including MSNBC and CNBC, sources say, shedding a once core part of the business that has been a casualty of the streaming video revolution.

Comcast’s announcement that it will spinoff almost all of its cable networks has left a host of questions as to the path forward, particularly given the intertwined nature of NBC News with MSNBC and,

The new publicly traded company is set to debut next year, with a bundle of channels that also includes Oxygen, E! and Syfy.