Why not a tag-team tournament every year? It puts the spotlight back on the tag titles and existing tag teams, and it also gives the writers lots of opportunities for wacky combinations where it actually has some consequence beyond a Raw or Smackdown match. Plenty of possibilities there. Maybe one guy in an established team decides to screw his partner and find a new one. Maybe there's a superstar nobody wants to team up with because he's a jerk. Maybe you do randomly selected teams to fill a couple of spots. It just seems more interesting than another PPV full of rehashed stuff from the last three weeks of TV.
I would lose my shit if they ever brought back the Jim Crockett Sr. Memorial Cup Tag Team Tournament, but I honestly don't think they'd have enough teams to fill out the field unless they used thrown-together singles guys. But holy shit, could you imagine a tournament with this field with say the winner declared tag champions, thus forcing Hell No to defend three times potentially:
1. Daniel Bryan & Kane v. Kassius Ohno & Antonio Cesaro (or Wade Barrett & Cesaro as the European Invasion)
2. Rey Mysterio & Sin Cara v. The Primetime Players
3. Cody Rhodes & Damien Sandow v. The Usos
4. John Cena & The Rock v. Dolph Ziggler & Big E Langston
5. CM Punk & Brock Lesnar v. Alberto Del Rio & Ricardo Rodriguez
6. Seth Rollins & Dean Ambrose v. Sheamus & Ryback
7. Randy Orton & HHH v. Primo & Epico
8. Big Show & Mark Henry v. Kofi Kingston & R-Truth
Just for fun, let's see how we could do this:
Quarterfinals:
Ohno & Cesaro v. Mysterio & Sin Cara (Kane and Bryan break up to give the Kings the match)
Rhodes Scholars v. Cena & The Rock (seems like the likeliest pairing)
Heyman Guys v. The Shield (Brock hitting an F5 on poor Ricardo to advance? EPIC. Ryback would walk out on Sheamus to put the Shield through)
Evolution v. Show/Henry
Semifinals:
Ohno & Cesaro v. Cena & The Rock (again, seems like the likely pairing based on heel-face alignment and star power)
The Shield v. Evolution (I was torn here but I think they'd do an angle where Brock apparently opts out of the tournament after one match because his contract doesn't stipulate working more than once, leaving Punk to get beat 3-on-1.)
Finals: Cena & The Rock v. The Shield (Team Crock continues their steamroll into the finals, while Brock returns for a brawl with HHH, sending the Shield onwards)
Winners and tag champions: The Shield (This way they get a big rub from beating the biggest stars and don't have to get beaten yet.)
But hey, as I always say, tournaments are awesome.