The Royal Rumble is nearly upon us and the rumour mill has been going into overdrive.With the first-ever women's Royal Rumble taking place too, the event has never had so much attention attributed to it.Which stars of yesteryear will return to make their presence felt in Philadelphia?Will Roman Reigns win the Royal Rumble again and set up his much-rumoured date with Brock Lesnar at the Royal Rumble?Will we see some debuts a la AJ Styles in 2016? Or, will some legends return?Well, one legend has already been spotted in the City of Brotherly Love.The Undertaker was in New York for the 25th anniversary of WWE Raw, but now he has been spotted in Philadelphia ahead of the Rumble, too.

Now, it's worth noting that his wife, former women's champion Michelle McCool was also at Raw and could well be a surprise entrant in the women's Royal Rumble. He was pictured with his family, so it's perfectly plausible he is just there with them.

However, seeing as he isn't officially retired, many reports have suggested that the Deadman will be a surprise entrant in the Royal Rumble and set up his WrestleMania bout with John Cena.

Dave Meltzer has already reported that the WWE pitched an idea to the Undertaker about appearing in the 30-man Royal Rumble, but he could not confirm if the Phenom went for it or not.

Still, the fact that he is in the city would suggest that something is on the cards.

It had been billed as though Roman Reigns has retired the Undertaker at WrestleMania 33, and the Big Dog has spoken about what an honour it was to face the legendary 'Taker on the grandest stage of them all.

"It was a great honor," Reigns admitted. "We have a whole new generation here. We have a young generation of talent coming up and it's going to get to a point one day where there's only a handful of us that can say yeah, I've been in the ring with John Cena, I've been in the ring with Randy Orton, I've been in the ring with the Undertaker, with Shawn Michaels, with Kurt Angle, with Triple H.

There's a lot of young guys who are never going to have that experience and are never going to have that opportunity to learn from being out there with guys like that."