#4 Finn Balor will turn heel
This one is a bold prediction because of Finn Balor's popularity with the fans, and especially the merchandise WWE can sell with his demon persona. However, after awhile all things get stale.
The same can be said about Balor; while he still is very popular now, it would be better to turn him heel before fans become tired of his persona and he becomes just another guy.
Fans drowned out a popular wrestler with 'She's a racist' chants recently
There are many ways WWE could go with a Balor heel turn. Maybe he gets frustrated with where he is on the Raw pecking order or someone could push him over the edge.
We could see a Balor Club stable similar to Bullet Club, or he could form a new version of "The Club" with Gallows and Anderson. These could be great ways to shake things up. Just picture "Evil Demon" Finn Balor vs. Woken Matt Hardy. The possibilities are endless.