8. Undertaker Match
One match WWE fans have always wanted to see is Sting against The Undertaker. Their cryptic, creepy gimmicks match up well with each other. Sting was WCW's Undertaker. Undertaker was WWE's Sting. At times, they didn't speak and let their actions speak for themselves. Other times, they were very outspoken characters. A match between them would be arguably the biggest match in WWE history. Some might think because of the magnitude of this match, it should be saved for WrestleMania. While the show of shows is the biggest event of the year for WWE, SummerSlam has always been looked at as a huge event. It is the biggest event of the summer and usually leads to a big change in WWE storylines. Last summer, Randy Orton cashed in Money in the Bank and became WWE Champion when Triple H turned on Daniel Bryan and helped Orton win. Undertaker and Sting don't have much time left as physical wrestlers, if any at all. WWE doesn't need to waste time to wait until WrestleMania. SummerSlam is an event that is big enough for what would be the most anticipated match of all time.