Rusev has been built up strong for a year. That shouldn't end now. Hopefully WWE put Rusev over John Cena this weekend at WrestleMania 31, in turn opening up a world of potential for the big Russian heel. By keeping Rusev undefeated he'll be instantly elevated to main eventer level. He'll have defeated John Cena on the biggest stage of them all, which is a huge feat for any performer. With that level of notoriety established, WWE should go the whole way and keep Rusev undefeated throughout 2015. Get him over as an unstoppable heel, before eventually putting him against babyface Brock Lesnar at Mania 32. It would be two unstoppable beasts butting heads. Fans would love it. A fun way to establish it this year at Mania 31 is for Lana to bump into Paul Heyman backstage. They could then argue over who has the tougher client.