1 - Have Reigns Ruin The Next Shield Reunion

One would assume that whenever Dean Ambrose makes his return from injury, WWE will try to put together yet another Shield reunion, however, if you're asking me, it shouldn't happen.
Instead, make it look like the popular trio is going to reunite, and then have Reigns spoil it by taking out both Ambrose and Rollins. By doing that, they'd have Reigns ruin something that fans have been dying to see, thus he'll avoid being the heel who is cheered more than his opponents.
What was Sabu really like? More info HERE.
The long-term idea with this would be to turn Reigns back if/when the WWE fans get behind him, and then do a Shield reunion shortly thereafter. But if it doesn't work, and the fans continue to hate him, then, well, at least they've created a top heel who the fans legitimately dislike.