Andre the Giant and Fabulous Moolah Battle Royal(s)
These two battle royals will take place on the main show because WWE is looking to make a bigger deal out of the Andre version thanks to the HBO special. The other is for the women and it is of course the first ever of its kind, so it will be touted as another groundbreaking moment for women's wrestling. All the under-card and mid-card talent will be present for the two matches to get everyone on to the show.
As for the winners, there are many options. For the women's, the winner will probably be Becky Lynch, who is the woman with the most star power without her own 'Mania match. For the men, Dolph Ziggler will pull out the win. He seems to be on the cusp of a major main event push and the win here would cement a top status. The men's battle royal may also feature guys such as Randy Orton and Bobby Roode.