Nope. They've confirmed nothing.
The rumoured plan has always been that there will be two champions (not a single one who does both shows), and that Smackdown would be getting the new one. Rollins/Reigns keeps the WWE Title, and then Styles vs Cena at Summerslam for the Smackdown Title (tournament final or whatever).
But plans changed and Ambrose is now on Smackdown. So Maybe they have Ambrose retain and doing a tournament on Raw instead.
I would seriously hope so. Otherwise Smackdown doesn't have a thing to fight for. Raw has the Women's champion, the tag team champions, the United States champion, a brand new Cruiserweight division AND all the most exciting of the young talent in the company. Take the belt off Ambrose and all you've got is him and the mega stars of yesteryear and the Intercontinental Championship until they create this new title that we're supposed to take seriously.
Cena, Orton, the Miz, Del Rio, Kane, the Usos and Naomi, Natalya... holy hand-me-downs Batman. This would be like giving my daughter the Tampa Bay Rays shirt I've got in my closet that I bought back in 2010; that's so faded you can't even read the "official licensed product" logo at the bottom anymore.
I mean that with as much contrast as possible to the WWE's company use of all those current Smackdown wrestlers while Raw gets the brand new stuff.