One thing is certain at WWE Elimination Chamber on Feb. 19 – someone will be leaving in an ambulance by the end of the night. On the Feb. 6 Raw SuperShow, Interim Raw GM John Laurinaitis announced a rematch between John Cena and Kane. In a move he said the WWE Board of Directors liked, the Interim Raw GM said the rivals will clash in an Ambulance Match.

The rules of an Ambulance Match may be simple, but getting to the final bell will be anything but as there are no pinfalls, submissions, count-outs or disqualifications. To win, a competitor needs to incapacitate his opponent, throw him into the back of a waiting ambulance and shut the door, sending him directly to the nearest medical facility.

Brutal and barbaric, an Ambulance Match at Elimination Chamber may be the only appropriate setting as one of the most intense rivalries the WWE Universe has ever seen reaches its apex.

While some conflicts explode after just one inciting incident, others build slowly and steadily over time. When it comes to Cena and The Big Red Monster Kane, their rivalry has intensified each week for the past few months, with each act of aggression topping its predecessor. In his continued efforts to get Cena to finally embrace the hate, Kane has used those closest to Cena to get his message across.

Kane’s relentless assault on Cena’s friend, Zack Ryder, began on the Jan. 3 episode of Raw SuperShow, when The Devil’s Favorite Demon tried to drag Ryder into the abyss underneath the ring. Luckily, Cena was there to save the day, but that did nothing to quell the monster’s fury.

The next week, Kane chokeslammed Ryder off the loading docks outside the arena, seriously injuring him (WATCH). Then, on the Jan. 23 Raw SuperShow, Kane intensified his attacks, chokeslamming Ryder through the stage and sending the Superstar to a nearby medical facility (WATCH). A visibly furious Cena uncharacteristically snapped, refusing Josh Matthews’ interview request by knocking the microphone out of the announcer’s hand.

The following Sunday at the 25th anniversary of the Royal Rumble, Cena and Kane battled to a double count-out. But it was naïve to think that a ring bell would be enough to stop these two from tearing each other apart. The war raged on outside the ring and all over the arena, with Kane getting the upper hand on Cena, courtesy of a steel chair. (PHOTOS)

Kane’s constant torment has taken Cena to unchartered territory, revealing a vicious and previously unseen side of the Leader of Cenation, as witnessed on the Jan. 30 episode of Raw. After Eve’s loss to Divas Champion Beth Phoenix, Kane appeared at ringside, terrifying the helpless Diva. An incensed Cena again came to the rescue, continually battering Kane with the steel ring stairs and sending The Devil’s Favorite Demon scurrying through the WWE Universe. (WATCH)

Now, the two powerhouse Superstars prepare to meet at Elimination Chamber, in what will be their most vicious bout yet. A rare stipulation throughout history, the WWE Universe hasn’t witnessed an Ambulance Match since Survivor Series 2003 which, perhaps unsurprisingly, featured Kane. Despite a heroic effort on the part of Shane McMahon during that match, The Big Red Monster’s brutal assault proved too great and it was Kane who slammed shut the ambulance doors on his opponent

At WWE Elimination Chamber, World Heavyweight Champion Daniel Bryan will defend his title against five other Superstars in the SmackDown Elimination Chamber Match. With a chance to headline WrestleMania at stake, Bryan will be challenged inside the massive structure by Wade Barrett, Intercontinental Champion Cody Rhodes, Big Show, The Great Khali and Santino Marella.

The World Heavyweight Champion will truly have the odds stacked against him once again when he steps into the Elimination Chamber on Feb. 19. Each Superstar participating will draw a number from one to six. The competitors who pick one and two will start off the match, while the other combatants will be locked in individual pods, waiting to enter the melee at regularly scheduled intervals. Superstars will be eliminated if they are pinned or submit. The last competitor standing will walk into WrestleMania the World Heavyweight Champion.

Bryan has never been inside the Elimination Chamber. However, the champion has managed to escape every predicament he’s found himself in in recent months. At the Royal Rumble, Bryan was trapped inside a steel cage with Big Show and Mark Henry. The World Heavyweight Champion wriggled free from the grip of The World’s Largest Athlete and escaped, still in possession of the title. Unfortunately for him, there is no escaping the Elimination Chamber. Can the crafty champion still find a way to retain his title?

Wade Barrett is tailor made for this type of showdown. The Superstar behind the Barrett Barrage holds the ideal combination of ruthless nature, English tenacity and unbridled ambition. Having never won a World Title, the Elimination Chamber could be the perfect opportunity for him to finally rise above.

SmackDown’s Elimination Chamber Match features not one, but two giants. The presence of Big Show and The Great Khali will make winning a tall task for anyone in their path. The World’s Largest Athlete will be looking to get his hands on Bryan, who ended his most recent World Title reign in a mere 90 seconds and has not let him forget it since. Khali, a replacement for the suspended Mark Henry, has his eyes set on becoming a two-time World Heavyweight Champion and will try to demolish anyone brave enough to attempt stopping him.

Cody Rhodes may have the most to gain in this match. The Intercontinental Champion has made it known that he intends on simultaneously adding the World Heavyweight Championship to his trophy case. This may be his best chance to accomplish that goal, though he is also competing in his first Elimination Chamber Match.

Although Randy Orton was originally slated to compete in the Chamber, a concussion on the Feb. 13 Raw SuperShow would prevent him from doing so. This paved the way for Santino Marella to leave the WWE Universe in a state of shock. The Italian Stallion overcame competitors from Raw, SmackDown and WWE NXT in a grueling Elimination Chamber Wild Card Battle Royal set up by SmackDown General Manager Theodore Long to earn the right to replace The Viper. Is the enthusiastic former Intercontinental Champion up to the challenge that awaits him on the most chaotic stop on The Road to WrestleMania?

With the World Heavyweight Championship hanging in the balance, these WWE Superstars are sure to put it all on the line in this career-altering bout. The Road to WrestleMania runs through Elimination Chamber, live on pay-per-view, Feb. 19 at 8 ET / 5 PT