John Cena (L) vs Rusev (R) on WWE Extreme Rules 2015 WWE Network

The hype and build-up for the WWE Extreme Rules 2015 event have already begun. After Wrestlemania 31, which took place on 29 March, there is a lot of speculation that the next PPV event - Extreme Rules - may feature rematches from the show of shows.

While the only confirmed match for Extreme Rules is John Cena vs Rusev for the United States Championship, it was alluded to on SmackDown that Randy Orton will challenge Seth Rollins for the WWE World Heavyweight Championship. However, that match is not finalised, states a Daily DT report.

The website has put together a speculative line-up of matches for the upcoming big event:

WWE Intercontinental Championship Match
Daniel Bryan vs Dolph Ziggler vs Bad News Barrett vs Sheamus (Speculation)

WWE United States Championship Match
John Cena (c) vs Rusev (Confirmed)

WWE Divas Championship Match
Nikki Bella (c) vs Naomi (Speculation)

WWE World Heavyweight Championship Match
Seth Rollins (c) vs Randy Orton (Alluded to on SmackDown)

The report also speculates a Damien Mizdow vs The Miz match as part of the Extreme Rules event but suggests an equally strong chance of the match taking place on Monday Night Raw instead.

"This is a feud that deserves a pay-per-view spot with all the buildup it received since January. However, with the way it is going, the match may happen on Monday Night Raw."

WWE Extreme Rules 2015 will take place on 26 April, 2015 at the Allstate Arena in Illinois, US.