WWE Championship: AJ Styles (c) vs. The Miz

Daniel Bryan might get his shot at Crown Jewel or somewhere else, but there's no denying that a feud between the phenomenal one and the IT guy will be one to watch with bated breath.
In their few previous confrontations, both men have proven to have some genuine chemistry. Add to that the alignment dynamics and fans wishes to see The Miz once again climb to the top of the mountain, means this feud will occur soon.
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AJ Styles isn't long for the championship, though they might just have him retain here. This will prolong the feud long enough for Miz to regain the championship just as Bryan once again ascends to contendership, drawing a great parallel.
Unfortunately, it also means the continued pattern of Styles current reign, that has made it stale in the eyes of the fans.
Still the contrasting combatants might light it up unlike Styles previous two dream rivalries in the WWE. Giving Styles someone who can also take a loss but still remain relevant and make him relevant, is perfect.
The Miz as mentioned will win the title eventually, for now, Styles builds along as champion en route to breaking a modern-day record, proving he is the best in the world.