#3 Blood
This is definitely a controversial topic. The reason that this is a legitimate option, however, is that WWE has intentionally used blood on a number of occasions over the last few years. Even though it's the PG Era and blood has been almost nonexistent for over a decade, just shortly after the PG rating started in mid-2008.
Brock Lesnar made a mess of Randy Orton's head at SummerSlam 2016. CM Punk intentionally bled during a cage match against Jerry Lawler in the summer of 2012. Maybe most notable of them all, while it wasn't as terrifying as their match 13 years earlier, Brock Lesnar and The Undertaker both bled a heck of a lot during their Hell in a Cell match in 2015. Intentional, but apparently not through the use of traditional blades.
Granted, these were all major Superstars, but it doesn't mean WWE can't pull it out for special occasions. It also helps WWE to cut back on the rekindled expectation of Superstars taking dangerous falls.
A bit of blood after being thrown face-first into a cage multiple times, or having your face raked against the steel would make for a great visual, and when done correctly, blood can be beneficial to a wrestling match.
That's even more legitimate in 2019 because of how infrequent it is now. When Randy Orton was left as a shell of a person at the end of SummerSlam 2016 it was shocking, and people still talk about it. The same goes for when Kevin Owens headbutted Vince McMahon a couple of years ago and made him bleed (however little it was).
It would be showing some real progress in WWE's push for women's equality to have Becky or Sasha bleed on Sunday, but if not one of them, surely the terrifying new The Fiend character would become an even bigger attraction by making Rollins get his head closed up with a number of stitches backstage after she show.
It could also help Bray save face if he doesn't win the title. You don't win, but you do a ton of damage to the champion, which is a big statement to make.