#2 Unification Match
Once again the brand split has been exposed as an experiment gone wrong. Nothing exposed this more than WWE Backlash. The Universal title, Cruiserweight title, and both tag team titles were not defended.
The Styles vs Nakamura WWE Championship match went on before the Reigns vs Joe match, more evidence that SmackDown Live is the B show behind Raw. WWE’s decision to co-brand all pay-per-views was a disaster proven by Backlash’s failure; a failure confirming that the brand split must come to an end.
However, WWE can turn a negative into a positive by capitalizing on the popularity of unification matches. It has been about five years since WWE's last world title unification match so fan interest would probably be high.
The last one saw Randy Orton defeat John Cena at TLC 2013 to unify the WWE Championship and World Heavyweight Championship. A compelling unification match angle would be a great way for WWE to erase Backlash from the minds of fans.