Ryan (Teen Mom)
If he's going to be a jerk who basically ignores his wife and child so he can just party all the time, the least he could do is contribute to society by doing a Challenge. He'd earn cash to support the family he doesn't want, he'd probably get smacked by Wes on first sight (which would be awesome) and he'd get to make out with a bevy of drunken girls. Everybody wins.

Ronnie (Jersey Shore)
He's all bulked up, filled with testosterone and willing to throw a punch at just about anyone who gives him the slightest bit of grief. In other words, he's practically made to be on this show. Put him and Sammi Sweetheart on the same team and watch his head explode as she's unable to finish challenges and just generally drags him down.

Roxy (The City)
Pretty, bitchy and completely devoid of any real-world job skills? Perfect. She knows how to party, likes to randomly trash places and seems like she'd be open to dabbling in some drunken bisexual escapades.

Stephanie (The Hills)
We already saw Speidi in the jungle and it wasn't pretty. But with The Hills ending, ShePratt will need a way to stay in the limelight, since she has even less marketable appeal than her co-stars, and The Challenge could do the trick. We'd tune in to see her cry as she hangs from a 12-story platform as well as to watch her get thrown around during a duel.

Carlton (Taking the Stage)
The Challengeguys can't all be big meatheads; there needs to be a sweet dimwit who tries to keep the head-butting in the house to a minimum. Carlton could fill that role. He's cute, likes to sing and dance, is pretty fit and doesn't like to see his friends argue.

Any Douche (Is She Really Going Out With Him)
We'd be hard pressed to pick from all of the Alpha Bags and Jock Scrotes to find the perfect one for The Challenge, so whichever one shows up first for casting (thinking he's just meeting his girlfriend for a date) would be the one who gets on the show. Then again, the producers might end up out of luck when none of them turn up.

Jenelle (16 & Pregnant)
The censors on The Challenge are always hitting the bleep button, so they'd have a field day with this teen mom. She loves to scream at her own mother and she's generally a badass. We'd want Coral to return just to set this girl straight and we'd fully expect a special appearance midway through the season by her temperamental baby daddy -- if he's not in prison during filming.

Cori Cooper (My Life as Liz)
We're still not sure if Cori is slutty in real life or if that's just her TV persona, but either way, we want her on The Challenge. She a total mean girl who loves confrontation and we can see her being very manipulative and doing whatever it takes to win the cash.

One of the Heavy Impact guys (America's Best Dance Crew)
What The Challenge has been lacking lately is a Big Easy type, since Eric almost died in one of his last appearances. The show needs an overweight but surprisingly agile guy and that's where these break-dancing Heavy Impact boys come in. They look like chubby couch potatoes but they can actually move.

Ty (The Real World: DC)
Well, obviously The Challenge is going to need some fresh Real World alums at some point, and Ty would be our first pick. He's insanely aggressive (which is a fine quality for a show that centers around grown men beating the crap out of each other) and he's a total ass who treats women like dirt. So he and Kenny would be best buddies. Let the bromance bloom.

In related news, Jersey Shore is looking for new blood and has the most honest casting call we've ever seen.