4. A Rare Window Of Opportunity
The timing and circumstances are perfect for WWE to execute this match. There's none of the pressure of WrestleMania, allowing the two performers to work the match in a more relaxed environment. If they screw up and do suck, it will be far less of a big deal than if it had been at Mania. If it is awesome and a great match, then they get more spotlight and don't end up overshadowed like Mania would've done to them with so many big angles on one show. This is also quite possibly a case of now or never. If The Undertaker is retiring next year at WrestleMania 32, then SummerSlam is likely his penultimate match. If WWE don't cash in on this huge money match now, then they'll never be able to bank what is one of the few dream matches they've never done before.