The lines between Mortal Kombat and World Wrestling Entertainment blurred at today's annual Royal Rumble pay per view event. Wrestler Zelina Vega entered the rumble match at #25 dressed as one of the hottest Mortal Kombat 11 DLC characters: Sindel! Take a look:

On Sunday, Mortal Kombat Online invited fans to participate in a social media experiment called the Mortal Kombat: Royal Rumble. It combined hype from two of NetherRealm Studios' latest projects, including Royal Rumble sponsor: WWE Immortals!

Inspired by the annual WWE spectacle; the MKO event featured 30 randomly drawn kombatants, entering at regular intervals to fight for enduro supremacy. Shinnok was the last kombatant standing - buoyed by Twitter support, and fandom's hopes to see the fallen elder god return to prominence in Mortal Kombat X.

Many klassic characters received dedicated support from fans, but a few entrants left onlookers scratching their heads. A list of 85 kombatants was compiled for the draw, replicating the WWE tradition of surprise returns and unlikely upstarts with a few non-playable characters from MK past. Here's a refresher on some of the characters fans didn't recognize during the Royal Rumble:

NetherRealm Studios are back in the 'rasslin business! The developer released the free fighting app WWE Immortals earlier this month - just in time for the annual Royal Rumble! We think it's such a swell game, we're celebrating with our own take on the WWE classic - and we need you to make it work!

We'll be asking "Who's Next?" when 30 Kombatants are drawn randomly at regular intervals to enter the first ever Mortal Kombat: Royal Rumble!

It will all go down tomorrow (Sunday) - with the Fan Koliseum deciding characters' fates by voting for eliminations on the forum, and boosting their chances via Twitter! Better still, every participating fan will go into the draw to win themselves a limited edition Mortal Kombat kollectible pin! Here's what you need to know:

Mortal Kombat - Royal Rumble Rules:
• 30 Kombatants will be drawn randomly to enter at regular intervals.
• The MK Royal Rumble will begin when #1 & #2 are announced.
• Each entrant will be announced via @MK_Online & the forum.
• Kombatants begin with 12 elimination points.
• For every 5 Retweets & 10 Favorites a Twitter entrance receives - the corresponding character will gain +1 elimination points. [Tallied during each subsequent entrance.]
• Fans will vote to eliminate active characters by posting to the forum.
• An elimination occurs when the voting tally exceeds a characters points total.
• Fans can vote for an elimination once per entrance: Points will remain subtracted, but a new entrance will grant users the right to vote again for any character they decide.
• Eliminations will give points to randomly assigned eliminators.
• There must always be at least 1 kombatant active.
• Kombatants remaining after the 30th entrant will be systematically eliminated based on their points and the total Retweet & Favorites received.
• In the tradition of the Royal Rumble - expect surprises! The 30 entrants will be drawn randomly from a total field of 85 characters!
• Prize winners will be notified within 48 hours.