Here is some more info on the teams. I will be watching!
Abram & Cara Maria: The two met on The Challenge: Cutthroat and began to show affection for each other throughout the entire season of The Challenge. After the show ended, the two continued to date, and Abe provided moral support to Cara Maria over the phone during her stint on The Challenge: Rivals, but have since separated.
Aneesa & Rachel: The two met on Battle of the Sexes and developed a relationship after the show, which was unknown to most viewers until this relationship was revealed during The Duel II, where tension occurred between Anessa, Rachel, and Rachel's newest partner at the time, Jenn.
Camila & Johnny: Camila had stated that she had a crush on Johnny and that she would marry him on The Challenge: Cutthroat, but nothing much was shown happening between the two of them. A possible fling was hinted at during the season's The S#!% They Should've Shown special.
CT & Diem: CT and Diem met on The Duel where CT instantly developed a crush on Diem, who was at the time dealing with the side-effects of her chemotherapy. CT had helped Diem to feel confident with herself by the end of her time on The Challenge, and the two began dating after. The two were still dating as of The Gauntlet III, but due to how Diem felt she was treated on that season she broke up with him prior to the reunion.
Dunbar & Paula: Paula and Dunbar had a relationship based upon fighting with each other, and kissing and making up through out The Island and The Duel II. It was revealed on the reunion that the two did have sexual intercourse after leaving New Zealand. After feeling betrayed by Dunbar before her elimination on Cutthroat, Paula felt as if she could no longer trust him, and Dunbar stated that he was done with Paula Walnuts.
Dustin & Heather: Dustin and Heather were season sweethearts on their season of The Real World: Las Vegas (2011) and dated until facts about Dustin's past tore the relationship apart. They later got back together in an on-and-off relationship.
Emily & Ty: Emily and Ty quickly connected and hooked up on their season of The Real World: DC, but during the season the relationship turned bad when Ty's behavior became too much for Emily to handle and she became wary of entering a serious relationship with him. Ty and Emily later got into a tumultuous argument on Cutthroat.
Jasmine & Tyrie: Jasmine and Tyrie hooked up in the first episode of Rivals.
Leroy & Naomi: Leroy and Naomi were "friends with benefits" during their season of The Real World: Las Vegas (2011), but only got together at night if neither had found someone else that day.
Mandi & Wes: Mandi and Wes were teammates on Fresh Meat II, but would later hook up on Rivals after CT no longer expressed any interest in Mandi.
Mark & Robin: Mark and Robin met on Battle of the Sexes 2, where the two began a relationship that lasted even after the season had ended. On the Inferno II, Robin and Tonya got into an argument over Mark. In the first episode of The Duel, Robin revealed that she was single, and was no longer dating Mark.
Nate & Priscilla: Due to Priscilla's underage status during her time on The Real World: San Diego (2011), she was not able to get into the bars and clubs with her 21+ year old roommates, and one night Nate stayed home with her and the two hooked up while alone in the house. Nothing more occurred after this instance, despite an attempt by an intoxicated Priscilla during a group trip to Cabo San Lucas.
Sarah & Vinny: Sarah and Vinny were partners on Fresh Meat II, and began hooking up in the first episode. On Cutthroat, after Sarah stated that she would be voting Vinny into the Gulag, he expressed that he was done with any kind of friendship with her.