#1. Dual-branded PPVs
This is something that happened a year ago, but it was actually the first major sign of the brand split ending. The last brand split, WWE committed to brand-exclusive PPVs for quite a few years, making sure that only the big 4 PPVs - Royal Rumble, WrestleMania, SummerSlam and Survivor Series would be dual-branded.
This edition of the brand split, WWE was much quicker in ending the brand-exclusive PPVs. While we do agree that two PPVs a month was somewhat an overkill, they shouldn't have ended it so quickly.
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The brand-exclusive PPVs gave the spotlight to several more superstars and gave them a spot on the card constantly. It really is no surprise that WWE gave up on them so quickly and at the time, many had predicted that it was only the first of many steps that would eventually see the end of the brand split again. Turns out, they were right.