#3. Brock Lesnar's surprise cash in
On the last week of RAW, Paul Heyman announced that Brock Lesnar will cash in at Extreme Rules 2019. However, since the WWE fans are acquainted with Paul Heyman's prior announcement regarding the cash in and Brock Lesnar's work pattern, we are not even expecting an appearance, let alone cash in from the Beast Incarnate.
The Universal Champion Seth Rollins and the RAW Women's Champion Becky Lynch are defending their titles in a winner take all mixed tag team Extreme Rules match against Baron Corbin and Lacey Evans. Since it is an extreme rules match, we may see Baron Corbin and Rollins put each other through a flight of stairs and other hazardous objects. In short, the winner will have a tough time and would be in no shape to defend the title after the match.
That would be the perfect moment for Lesnar to unleash an attack on the winner and take the Universal title back home.