2: The Shield implodes
Last year's Shield reunion was, for want of a better word, a failure. The trio's first match on their return was delayed because of Roman Reigns getting sick, and then the whole thing was just forgotten about because Dean Ambrose got injured during an episode of Raw.
While this is definitely a piece of fantasy booking, I have to think that the WWE had plans for a Shield triple threat match in mind when they decided to partner the three men back together. Rumours were going around that the original plan was for Ambrose to turn heel and feud with Rollins through WrestleMania, and it seems likely that that would have continued and ended up with Reigns getting involved during the Summer.
Ambrose is nearly ready to return from injury and will likely be competing at this year's SummerSlam event. The WWE has two options, they could either go for Ambrose Vs Rollins to put the wheels in motion for a later triple threat match, perhaps at Survivor Series or even WrestleMania, or they could simply rush plans and have the three men collide at SummerSlam. Either way, you can expect some Shield on Shield action this Summer.