#2 The Club vs. The Shield vs. The New Day vs. The Wyatt Family vs. Broken Matt Hardy and Brother Nero

Sure, this is a bit of a fantasy pick, but those in the WWE Universe can't deny that this would probably be the tag team match of a lifetime. They could even add in the stipulation of a ladder match for the titles and the four teams would probably have no problem tearing the house down in the most amazing way possible.
There could also be the possibility of adding in Broken Matt Hardy and Brother Nero, who returned to WWE during the tag team ladder match in Orlando last year. Maybe it would be a few too many Superstars and take away from the story of the match, but it would also be an absolute dream match that would satisfy fans on every possible level.
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This would also be a great way to determine the most dominant three-man team in The WWE, which would really pay dividends for that team's future in the company and beyond.
While I personally believe a win like this would probably go to The Shield or The New Day, it would be interesting to see if WWE put over talent that gained fame in another company, especially in the main event of their biggest event in the year!
Would it be awesome? Yes, and it would probably also be one one of the best main events in WrestleMania history if done right, but that is up to the WWE to do and they haven't always proven that they can do that.