4. Raw and SmackDown invade back
One fairly consistent aspect of invasion angles - particularly when it comes to the entire roster of a show coming after another one - is that the invading rarely goes just one way. WWE could quite feasibly book a week or two of NXT talents showing up unannounced to wreak havoc on Monday and Friday nights, but this will surely bring down the traditional main roster brands as they make an unwelcome visit on a Wednesday.
Having top stars like Seth Rollins or Roman Reigns show up on NXT will further reinforce the credibility of the third brand. Such invasions could also set up some intriguing dream matches along the lines of Rollins vs. Adam Cole or Matt Riddle vs. Cesaro. It is likely in everyone’s best interests to not blur the brand lines too thoroughly, but an invasion angle—going both ways—could be a fine way to draw extra eyes to NXT and establish the brand for fans who think that "developmental" means "lesser talent".
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