Michael Cole announced on Monday Night Raw that Orton had been injured by The Wyatt Family and he will not be teaming with Dean Ambrose this Sunday. Dave Meltzer noted on today's Wrestling Observer radio that Orton has a dislocated shoulder and that also explains why he was not on the tour of Mexico.
Orton will have an MRI soon. He had been working with an injury and his shoulder got worse and eventually dislocated in the last week.
Here is the updated card for Sunday's Hell in a Cell pay-per-view:
Hell in a Cell match
The Undertaker vs. Brock Lesnar
Seth Rollins (champion) vs. Kane
John Cena United States Open Challenge
John Cena (champion) vs. ???
Kevin Owens (champion) vs. Ryback
WWE Tag Team Championship
The New Day (champions) vs. The Dudley Boyz
Roman Reigns vs. Bray Wyatt
Divas Championship match
Charlotte (champion) vs. Nikki Bella
Dolph Ziggler, Cesaro, and Neville vs. Rusev, Sheamus, and King Barrett