#3 Becky Lynch makes Baron Corbin tap out
Other than the No Holds Barred tag match, Extreme Rules could feasibly be main evented by the mixed tag team match for both the Universal and the Raw Women's titles. Seth Rollins and Becky Lynch vs Baron Corbin and Lacey Evans does not sound compelling or attractive in any way, but the finish could be a significant moment for WWE. It has been made all the more possible after The Man made Mike Kanellis tap out during a mixed tag match on last week's Raw.
Also, with the prospect of intergender wrestling possibly being discussed, we might see a good amount of action between Becky Lynch and Baron Corbin; more so than Seth Rollins and Lacey Evans. WWE could even book Becky to force the former Constable of Raw to tap out to the Disarm-her (or him). It would be a significant way to end what should be a solid pay-per-view, even if the match that precedes it doesn't impress as much.