Honestly, the E probably needs to pull the trigger on Rollins before Mania. I mean, he only has until May to cash in, right? If Reigns or Bryan win the title at Mania, they'll have a super short reign as Rollins pretty much has to win the title when he cashes in, doesn't he? They've been building him for over six months.
Makes more sense for him to win it before Mania and then lose it there...though I doubt management sees him as a Mania main eventer. I guess they could close the show with Triple H and Sting if they don't want Seth in that top spot against either Bryan, Orton, or Reigns.