#2. Corbin wins with the special guest referee's help
One of the reasons that WWE may decide to make Baron Corbin the Universal Champion is because of the sheer amount of heat he gets. The best way to turn anyone into a top babyface is to put him in a program against The Lone Wolf. It is almost a guarantee that whoever goes up against Corbin gets the love of the WWE Universe.
Also, if Baron Corbin wins the match fair and square, there's always the chance that the crowd may root for him in the coming weeks. This is where a heel special guest referee could really increase the amount of heat on Baron Corbin. The referee should be someone who's a heel through and through like Rusev.
The two can even form a coalition in the weeks and months that follow. Maybe an NXT call-up could work too.