#4. Adds an extra layer to the main event

Let's be honest here.
The woman that ends up winning this match will be the undisputed champion of the entire women's division and that helps to make the marquee main event all the more special. In fact, it sets the winner, whoever that happens to be, on a separate pedestal than the rest of the division and could act as one of the greatest crowning moments in WrestleMania history.
Look who just shut down all of Tony Khan's critics! More HERE.
Beyond all that, doing this creates doubt about what will happen once one of the competitors win the belt and what it will mean for the future of the division. If nothing else, this is one of the biggest question marks heading into the show of shows and it is honestly a very enthralling one to think about.
On one hand, WWE could just have the winner hold the titles for a period of time and then lose one back to a Smackdown Live or Raw superstar but on the other, they could just unify the titles and go from there. In the end, both ideas are very intriguing to think about and offer up some pretty groundbreaking possibilities.