World Wrestling Entertainment (WWE) SummerSlam is just one week away and there are two huge matches that the WWE Universe will be closely watching.

One of the cards is, of course, the highly charged feud between the Undertaker and Brock Lesnar.

To recall, the Dead Man made an unceremonious appearance at WWE Battleground that cost Brock Lesnar a chance to regain the WWE Heavyweight title.

The Undertaker, apparently, made a return due to the continuous rants made by Lesnar and handler Paul Heyman with regards to their conquest of the Undertaker back in Wrestlemania 30. That triumph, of course, broke the Undertaker's streak, and both Lesnar and Heyman have been bragging about it ever since.

As for their meeting, Undertaker is a favorite to win the match. It may eventually even the score but on whether the storyline will end there or not is up in the air.

While the Undertaker has been rumored to be making more appearances, the likeliness of the two carrying on their feud will likely continue.

On the other end, there is that other bout where the stakes are a bit higher.

Seth Rollins and John Cena will face off with both titles on the line. Although Cena's status remains unknown due to a broken nose, chances are that the U.S. Champion will be around in New York on Aug. 23, 2015.

The question is — who will win it all? Or will there be a winner at all?

The tiff could end up in a no contest and Rollins will likely save his title (same with Cena) via disqualification.

Even though Rollins has not exactly been the type of wrestler who pulls up WWE's ratings, it seems equally hard to believe that he would lose the title to Cena at WWE SummerSlam.

A title change could occur so keep an open mind to that. It will all be up to the WWE and what their creative team has cooked up.

WWE SummerSlam will take place at the Barclays Center in New York next Sunday. The match will be aired live via the WWE Network starting at 7 p.m. EST or 4 p.m. PST.