The final chapter in the epic rivalry between The Undertaker and Brock Lesnar will be written Sunday night at Hell in a Cell.

The two legendary Superstars will be fighting inside Satan's Playground, and though the cell walls are meant to keep people out, there may not be a clean ending when these two behemoths collide at the Staples Center in Los Angeles, according to The Wrestling Observer Newsletter (via WrestlingInc).

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If "The Beast" is to lose, word is that it will be via outside involvement from someone looking to spark a new feud, possibly leading up to WrestleMania.

Here are three possibilities.

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1) "Stone Cold" Steve Austin

The WWE shied away from having the "Texas Rattlesnake" and "The Beast" build toward a WrestleMania clash during the podcast Monday night, but it doesn't mean they don't have an ace up their sleeves. Austin has called any type of return a "bulls--t rumor," but he's also expressed interest at wrestling one final match in his home state of Texas, which is where WrestleMania 32 will take place. Austin could come down with a steel chair and attack Lesnar, leading to The Undertaker winning the third battle.

2) The Rock

Another rumored opponent for Lesnar at WrestleMania 32 is "The People's Champion," and he could very well make his presence felt Sunday. The potential match is interesting from a historical standpoint as Lesnar won his first WWE Championship from The Rock when the "Brahma Bull" was winding down his career in 2002. All these years later, this would make for a fascinating matchup. If The Rock came out Sunday and hit a Rock Bottom on Lesnar, it would fire the first salvo of the feud.

3) Daniel Bryan

There were rumors that Lesnar had four possible WrestleMania opponents, including the two legends mentioned above, Seth Rollins and Roman Reigns. Still, Bryan has shown interest in battling "The Beast" in the past and he could be cleared to return to action soon. The WWE may not risk Bryan's health further by putting him in the ring with the physical Lesnar, but if he campaigns enough for it, "The Beard" could very well get what he wants, even if it proves to be his final match. Bryan attacking someone would be slightly out of character, but if he came into the ring and nailed Lesnar with the Knee Plus, the crowd would go wild.

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