On September 21, WWE will bring us Night of Champions, the only pay-per-view event of the year in which every title is guaranteed to be on the line.

A rematch of the SummerSlam main event between Brock Lesnar and John Cena for the WWE World Heavyweight Championship has already been announced.

Below, Sports Mole predicts the rest of the title programme for the show at the Bridgestone Arena in Nashville, Tennessee.

WWE Tag Team Championships: The Usos (c) vs. Goldust & Stardust vs. The Wyatt Family

The Usos have been one of the most consistently exciting acts on the WWE roster for the past six months, but were inexplicably left off the SummerSlam card.

There is not a lack of challengers for their titles either, so much so that there are likely be two pairings trying to dethrone them at Night of Champions.

Goldust and Stardust have beaten both The Usos and The Wyatt Family this week and future appearances are likely to reveal that the 'cosmic key' that the bizarre brothers are searching for is the WWE Tag Team Championships.

Pitting two face teams against each other does not always work, and therefore The Wyatt Family will probably be inserted into the mix.

Luke Harper and Erick Rowan have been on a losing streak of late, but their post-match beatdown of the Rhodes Brothers on Friday's SmackDown suggests that WWE are keen to continue to portray them as threatening.

They have great chemistry with The Usos, as proven by a couple of brilliant PPV matches earlier this summer, so their inclusion would ensure great action if not new champions.

WWE Divas Championship: Paige vs. Natalya vs. AJ Lee

Another Triple Threat match could pit newly-crowned Divas Champion Paige against both Natalya and her frenemy-turned-enemy, AJ Lee.

The Englishwoman regained the strap at SummerSlam by pinning AJ to consolidate her heel turn, but has since lost twice to Natalya.

Of course, AJ played a distractive role in both of those defeats, and so WWE officials are clearly indicating that this storyline is not over just yet.

By the usual booking rules, Natalya has earned her shot at the gold and will get it in Nashville, but her presence is only there to add an extra dimension to the long-running central feud between Paige and AJ, preventing it from becoming stale.

There will probably be the luxury of two interesting Divas storylines at Night of Champions, with Nikki and Brie Bella poised to go twin versus twin.

United States Championship: Sheamus (c) vs. Cesaro

Despite his status as a three-time world champion, Sheamus has brought no greater prestige to a struggling United States Championship.

It has languished in mediocrity for far too long and, while the Intercontinental title is benefiting from credible feuds, there are none to speak off regarding its mid-card companion.

WWE have the perfect storyline opportunity waiting in the wings to at least increase interest levels in the US strap. Alexander Rusev should stop waving his Russian flag around and point it straight at Sheamus.

However, the Bulgarian Brute appears to be entering a programme with Mark Henry, and so that is a chance that has passed WWE creative by for now.

Sheamus, another title holder who was missing at SummerSlam, must defend his belt at the Bridgestone Arena and Cesaro seems the most plausible choice of opponent.

The King of Swing and The Celtic Warrior have had some great physical matches in the past and, while another one-off bout between the pair is not going to help bring the US title back to relevancy, it will provide a decent filler match at least.

Intercontinental Championship: Dolph Ziggler (c) vs. The Miz

In what could be one of several SummerSlam rematches, The Miz may be given another chance to regain his IC title from Dolph Ziggler.

The ultra-popular 'Show Off' ended a 15-month period in the WWE wilderness with victory at the Staples Center and then defended successfully against Miz on this week's RAW.

The nature of that count-out win, however, keeps Miz in contention for a second shot at redemption and, seeing as he seems to be tied in with Kane and The Authority, it is easy to see how this match could be confirmed.

These two sons of Cleveland had barely been staying afloat in the WWE creative pool previously, but this feud has given both talents something meaningful to do.

WWE World Heavyweight Championship match: John Cena (c) vs. Seth Rollins

The wildcard. Could September 21 be the date that we see Seth Rollins cash in his Money in the Bank contract?

It is unlikely that the company's number-one guy, John Cena, will suffer consecutive clean pay-per-view defeats, and while there are a number of ways that this could be avoided, having Rollins in reserve gives WWE options.

Creative may want Brock Lesnar to carry the title until WrestleMania, which would no doubt create for a blockbuster main event, but, in this scenario, his part-time schedule will create week-to-week booking problems.

It would also leave Rollins in no-man's land, with a cash-in on Lesnar highly unlikely. He could take advantage of a fallen Cena, though, should Brock lose this Sunday only then to brutally punish the new champion after the match.

This would ensure that Rollins does not lose momentum by hanging on to the briefcase for too long, maintain Cena's superhero status and immediately set up a WWE title rivalry for the autumn months in which Lesnar could be absent.

This is just an out-of-the-box theory, but do not rule it out come Night of Champions.