There has been concern expressed within WWE this past week regarding SmackDown live event business. When WWE did the Draft after Edge retired, the idea was that SmackDown had to be made strong enough that it could still draw on the road. It's been noted that Orton, Christian and Sheamus aren't doing good business on top and WWE went in with the idea that Orton would be strong enough to carry the brand, as far as the business side of things go. All of this likely has to do with this weekend's SmackDown shows being canceled and moved to September.
Partial source: Wrestling Observer Newsletter