By Justin Barrasso A year before their faction’s debut, Roman Reigns and Seth Rollins knew they had chemistry in the ring. SI.com’s Week in Wrestling is published every week and provides beneath-the-surface coverage of the business of pro wrestling. Seth Rollins: “That was the moment that showed the three of us were of one mind and one goal”Roman Reigns, Dean Ambrose and Seth Rollins first appeared on WWE programming on Nov. 18, 2012, at Survivor Series. They were mercenaries for CM Punk, helping him retain the WWE title in a triple threat against John Cena and Ryback. It wouldn’t be for anoth…