#3 The Shield is reformed with a new member
Sure, you can always call up the Undisputed ERA to the main roster but the fact remains that unless they have strong opponents to feud with, it will be a futile effort. I'm guessing that they will have The New Day in their crosshairs, but how long can this potentially last?
The Shield vs. The Undisputed ERA would be a far better feud considering the fact that both are serious units that take their opponents out with surgical precision. But The Shield is a unit formed of three brothers, so who takes up Dean Ambrose's place then?
Ricochet is the first name that I can think of, for the said role. He is a babyface through and though and will also fit in great with Seth Rollins and Roman Reigns.
Roman Reigns will obviously have to come over to RAW for this potential union to take place, but the brand split is pretty much over anyway.