A former WWE United States Champion made his surprise return at a recent live event. He faced NXT Champion Oba Femi at an NXT live event in an unexpected match. The star is none other than The Bulgarian Brute Rusev, who was revealed as the surprise opponent for Femi's team on a house show in North Charleston.The former United States Champion was a major star in NXT before he joined the main roster in 2014. He made his debut on the company's developmental show on May 29, 2013. The powerhouse competed in a battle royal to determine the number one contender for the NXT Championship, but came up short.His return to NXT was very shocking, as it marked his first appearance for the brand since July 24, 2014. After he moved to the main roster, he won the United States Championship and even defended the title against John Cena at the following WrestleMania. The former Miro recently teamed up with Ethan Page and Jasper Troy to face Femi, Hank, and Tank.Fans were shocked to see Rusev on the NXT house show. It will be interesting to see if he was actually moved to NXT by WWE officials.Rusev faced Sheamus at WWE Clash in ParisAfter weeks of destroying each other in and out of the ring, Rusev and Sheamus faced off in a brutal Good Ol' Fashioned Donnybrook Match. The two initially had a bout on WWE RAW, where The Celtic Warrior emerged victorious.Their next encounter on RAW ended in a double count-out. Sheamus and Rusev's third showdown took place in front of the energetic Paris crowd. After putting each other through hell for 20 minutes, Rusev finally picked up a huge win over his rival.It will be interesting to see what's next for both men after their barbaric bout in Paris.