#3 Kofi Kingston vs Samoa Joe (WWE Championship)

Kofi Kingston's WWE Championship reign has been a decent one. It was never going to hit the heights of the incredible WrestleMania program between Kofi and Daniel Bryan, but this has not been the worst title reign by any stretch of the imagination.
After feuding with Kevin Owens and Dolph Ziggler, the New Day member will defend the title against Samoa Joe, thanks to the Wildcard rule. This is set to be a good match, boosted by the face-to-face segment on last week's SmackDown.
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Joe usually works well with smaller wrestlers and this should be no different. Expect a match similar to the ones Joe had with Ricochet and AJ Styles, among others.
#2 Aleister Black vs Cesaro

Aleister Black's debut match since moving to SmackDown in the Superstar Shakeup is certainly hotly anticipated, especially when his opponent is as good as Cesaro. These two hard-hitting Europeans could really have a slobberknocker of a fight on Sunday.
Black will surely get enough time to shine at Extreme Rules, with the big deal WWE has made this out to be.
The Swiss Cyborg might seem an odd choice be his first opponent but from a pure quality standpoint, he makes absolute sense.
Obviously, Aleister Black will win. But this really should be a showcase for Cesaro, as much as it will be for the Dutch Destroyer. This is one match that WWE must ensure does not get lost in the shuffle.