There will surely be plenty of special guests in Cleveland on Tuesday night as the defending champion Cavaliers open the 2016-17 NBA season against the Knicks. But the one who legitimately has the internet buzzing is none other than The Undertaker of WWE fame.

Here's the thing, though. It's not just that Mark Callaway, who plays The Undertaker, is in attendance. He's dressed up in full ring attire -- black hat, jacket, pants and gloves -- standing right outside the Cavs locker room next to a couple women, one of whom is holding the WWE world championship.

Take a look for yourself.

James Jones and Birdman even stopped by to pay their respects. You will notice in the above pictures that the Ultimate Warrior's widow is also there with Taker (more on that below).

So what exactly is going on? Well, that's yet to be determined.

The Cavs did wear WWE shirts during their 2015-16 championship run with players, including LeBron James and Kevin Love, donning tops featuring The Undertaker and Warrior. Timofey Mozgov was seen with the old-school smoking skull championship belt in the locker room after winning the NBA title, and Love also held it along with a special WWE world championship belt during the Cleveland parade.

There's also this: The Cavs used The Undertaker's theme song as entrance music during their playoff run.

Either way, no matter what The Undertaker does on Tuesday -- my guess is he comes out to his entrance music and presents LeBron with the championship belt -- fans are having a ball seeing the Dead Man in The Q.