#2. The Undertaker costs his team the match.
The Undertaker does not do anything on the basis of an impulse. He takes his time, especially for plotting an act of revenge. After Brock Lesnar snapped the Deadman's legendary undefeated WrestleMania streak at WrestleMania 30, we did not see the Deadman for a while. The Undertaker waited for more than a year to resume his rivalry against the Beast by costing him his WWE Championship match at Battleground 2015.
The Undertaker's other WrestleMania defeat came from the hands of Roman Reigns - his tag team partner at Extreme Rules 2019. Since the WWE ratings are plummeting down, WWE would be interested in pitting their two big dogs against each other in order to revive the ratings. Thus we may see The Undertaker costing his team dearly at Extreme Rules 2019 to set up a WrestleMania 33 rematch between them. A win over the team of the Deadman and Roman Reigns would help boost Shane McMahon's ego as well. Thus, it would make perfect sense.