With television rights for live sports and entertainment in a boom period, it had always been reported that WWE planned to cash in when its contract with NBCUniversal, which presently airs both Raw on Monday nights and SmackDown Live on Tuesday nights, expires in 2019.
The main thing WWE needs to agree on is that Smackdown Live needs to air preferably on Tuesday nights in order for the show to stay being "live". Smackdown started airing live in May 2016, increasing the value for advertising during the wrestling show. As such, WWE would potentially want to tailor SmackDown Live for a new demographic, which in turn could mean Raw and SmackDown Live adopting identities specific to their respective networks.
With the current television deal with NBC Universal ending at the end of September 2019, we may be close to an official announcement of any changes that may occur with where you are able to watch WWE programming starting next fall.
Especially after the brand extension in 2016, it wouldn't hurt to create more separation between WWE's two biggest weekly programs. Sources say that FOX is being speculated as the next home for Smackdown, which has been on NBCU networks since 2010.
Interesting tidbit among all the TV news today: NBCU is letting WWE SMACKDOWN go to open bidding.
Monday Night Raw has only aired on two networks in its 25-year history.
Rumors surfaced earlier this year that Fox Sports could be a good candidate to broadcast WWE shows in the near future. By airing on broadcast television every week, WWE could be motivated to stack SmackDown as much as possible.