#2 The Undertaker appears, lays both men out
We've already seen Triple H show up before Super Show-Down, cutting a pretty fantastic promo. We will see Shawn Michaels on TV next week, hyping the matchup. The only person to not have appeared on TV yet, who will be a part of the proceedings in Melbourne, Australia, is The Phenom himself.
We last saw him at the Greatest Royal Rumble pay-per-view. He seemed to be in phenomenal shape during his match. Maybe The Undertaker returns to make a statement and issue a challenge.
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Maybe The Undertaker wants to cost Roman Reigns his title for defeating him at WrestleMania 33. The two men could build a feud that lasts up to WrestleMania. But a likelier possibility is The Undertaker laying both men out, in the middle of the ring, setting the stage perfectly for future events.