On WWE.com, the photos they use for RAW and SmackDown could very easily end up being the fixed rosters for those shows:
John Cena could easily be left as the stalwart on the flagship. Bray Wyatt and Kevin Owens could very easily be given pushes as his antagonists. ADR can do whatever they want ADR to do. Charlotte and Becky could ground the female division on Mondays.
The New Day could provide some merch movers for the Tuesday show. Ambrose and Reigns could be the big singles stars. Dolph Ziggler can be doing...whatever. Paige and Sasha Banks can be your featured female players.
There's also no reason these six couldn't be the NXT talent called up. Seems likely that American Alpha would be in there though. I imagine Samoa Joe would end up on the same show as John Cena (RAW in this case), Finn Balor will end up on the same show as AJ Styles (probably RAW), Shinsuke Nakamura would end up on the show opposite Kota Ibushi (SmackDown seems likely), Bayley is the goody-goody hero girl for SmackDown and Asuka provides fresh blood on RAW. Austin Aries is a cruiserweight for the RAW side of things, but he could come later.