Tonight at 8 p.m. ET, the WWE presents Monday Night RAW from the O2 Arena in London as the countdown continues to Extreme Rules on April 26 from the Allstate Arena in Rosemont, Ill.

The main storyline heading into this show is between Randy Orton and WWE World Heavyweight Champion Seth Rollins as the two are set to clash in less than two weeks at Extreme Rules.

Orton earned the spot as No. 1 contender for the gold after he defeated Roman Reigns and Ryback in a Triple Threat Match last week. "The Viper" overcame Rollins at WrestleMania 31 before he went on to cash in his Money in the Bank briefcase to win the title later in the show.

Orton was also never granted a rematch after dropping the belt at WrestleMania XXX without being involved in the decision. "The Architect" got the last laugh against Orton last week, surprise attacking him with a Curb Stomp and the master of the RKO is bound to be out for revenge.

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With Reigns and Ryback losing last week, we'll find out what's next for them. There have been rumors that Reigns may take on Big Show at Extreme Rules while there is also speculation that the leader of the Roman Empire could team with "The Big Guy" to battle Show and Kane in a tag match.

Bray Wyatt has had cryptic promos once again in recent weeks and there are rumors that he could be directing them at Reigns while more about them may be discovered tonight.

The United States Championship division is heating up as well as John Cena and Rusev prepare to clash for the third time in as many pay-per-views at Extreme Rules. Cena has announced that he will once again issue an open challenge for the U.S. Championship, this time in the U.K.

Over in the Intercontinental Championship scene, England's own Bad News Barrett continues to prepare for battle with Daniel Bryan at Extreme Rules.

Another England native, Paige, will take part in a Divas Battle Royal tonight to determine who will face Nikki Bella for the Divas Championship on April 26.

As for the tag division, title-holders Cesaro & Tyson Kidd are still awaiting a match to be announced for them at Extreme Rules while the breakup between Miz and Damien Sandow continues to escalate.

With just 13 nights until Extreme Rules, more matches are expected to be added to the card while some stipulations could possibly also come about for existing clashes.

RAW Is London tonight as the WWE takes its flagship show overseas from the O2 Arena in England.