When The Undertaker was left lying in the ring at the climax of WrestleMania 33 following a defeat to Roman Reigns, it was insinuated that his in-ring career was done.

Several rumours have been doing the rounds in recent months that are contrary to that notion and without any official confirmation from The Deadman himself or the WWE, it's been left in the air.

One has to imagine the company has left it that way on purpose and even though 'Taker is now 52-years-old - bear in mind Ric Flair called it a day aged 59 - he might be capable of pulling off a dream match or two should the opportunity arise.

Fans have wanted to see The Phenom lock horns with John Cena at WrestleMania for years and the prospect of a Sting versus Undertaker bout has long been coveted as the biggest dream match left in wrestling.

Of course, Sting has retired after seriously injuring his neck against Seth Rollins in 2015, but that doesn't mean there are not options for Undertaker to pursue.

The WWE announced this week that fans will get the chance to meet The Undertaker at the Ace Comic Con in Uniondale, New York on December 8.

He's also set to be in Oklahoma the day prior to attend Wizard World, so the seven-time world champion is staying busy.

The fact that he is taking bookings through the WWE brings us to our next point - 'Taker is still under contract with the company for another four years.

According to Total Sportek, one-half of the Brothers of Destruction has four years to go on his $1.75 Million, part-time deal with the company.

While he could run that down doing sporadic appearances (like SD Live ahead of Survivor Series last year) and gigs like his pending date at Comic Con, the fact that his retirement has not been announced is significant.

It will be a huge deal when he finally, officially hangs up his boots and he'd go straight into the next Hall of Fame class.