Dean Ambrose vs. Dolph Ziggler - Rematch for the belt. Probably with a stipulation of some kind.
AJ Styles vs. Randy Orton - Styles just took out Cena and I can see Styles taunting Orton for Orton losing at SummerSlam against Lesnar.
The Miz vs. Apollo Crews - Rematch for the belt. Probably a Singles Match. Since it's "Backlash" and has that theme of "finishing feuds" and whatnot.
Bray Wyatt vs. Erick Rowan - Hear me out here. On the last SmackDown, Rowan fought Ambrose and lost. And afterwards (I'm just going to quote it from WWE.com): "In an eerie scene after the match, The Eater of Worlds was seen now rocking opposite of the ring in his chair. After a moment, Wyatt ominously stood up and left the sheep mask that Rowan often wears in the chair and simply walked away."
Baron Corbin vs. Kalisto - This was supposed to happen at SummerSlam? I mean Kalisto isn't actually injured from what I know.
The Usos (Jimmy & Jey Uso) vs. Breezango (Tyler Breeze & Fandango) - Probably a pre-show match.
American Alpha (Chad Gable & Jason Jordan) vs. The Vaudevillians (Aiden English & Simon Gotch) - Just because.
Becky Lynch vs. Nikki Bella - Assuming Nikki comes to SmackDown.
Carmella vs. Natalya - Again, the "Backlash" theme is all.
BENCHED:
Alberto Del Rio - Suspended
Curt Hawkins - Considered inactive
John Cena - Probably going to take a break
Kane - No reason
Konnor - No reason
Mojo Rawley - No reason
Rhyno - No reason
Shelton Benjamin - Injured
Viktor - No reason
Zack Ryder - No reason
Alexa Bliss - No reason
Eva Marie - Suspended
Naomi - No reason