WWE, I know you're reading this, so I'll give you some advice for free. You can make the tournament, the MIB briefcase, and Sheamus, way more interesting if you have him do an announced cash in weeks before the tournament, maybe even as soon as possible.
Sheamus can now crow for the next few weeks on how he's going to face the tournament winner, regardless of who it is. Gives his character something to do, and helps him build heel heat. You build drama by having this albatross hanging over the tournament; no matter who wins, he's already ****ed because he has one more match left against a rested opponent. So if a fan favorite like Reigns or Ambrose does win it, and even beats Sheamus too, it becomes a major holy **** moment.
Because you know a surprise cash-in by Sheamus is going to fall totally flat in front of a crowd. And I even like Sheamus, but he's not exactly where the money is right now.