#1 A great return and a dream feud

Rey Mysterio returned to WWE TV after his last appearance on the Greatest Royal Rumble. He was scheduled to face the United States champion Shinsuke Nakamura for the final spot of the World Cup.
Even after being away from the ring for a brief period, Rey showed no sign of ring rust, and was totally accustomed to WWE's style of wrestling from the get go. Shinsuke Nakamura also played his part to perfection, in what may be his best match in recent times, although he hasn't wrestled much.
Rey Mysterio defeated the United States champion clean, signalling that after the World Cup is over, he could move on to a feud for the United States Championship. Rey Mysterio's high flying abilities would gel well with the hard hitting style of Shinsuke Nakamura.
If handled correctly, this could become an interesting feud, bringing Nakamura back to the limelight as well.