Midcard title: Pete Dunne vs. The Miz vs. Baron Corbin
While the United Kingdom Championship is not by any means the official midcard title of NXT in any true sense, it's the closest thing to it, seeing as how the stars from this division have been incorporated solely into NXT shows and nothing more.
Without a proper midcard title, the United Kingdom Championship would have to play that part, meaning Pete Dunne would be up against The Miz and Baron Corbin.
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Much like the situation with SAnitY, Dunne's status in the eyes of WWE fans would severely hinder him as he's been seen only a few times in the entire year and only by those who watch more than Raw and SmackDown. Most people would have no idea who he was.
What he does have to his advantage is that his character is tougher than The Miz's and has more finesse than Baron Corbin's, so if anybody was going to get an upset victory, he's just as good of an option as you can get—particularly if he were to pin The Miz.
The edge would still be in Raw and SmackDown's favour, but Dunne pulling out a victory wouldn't be the craziest thing in the world.