While it would seem inevitable at some point, and thus obvious, there is already said to be talk within WWE about plans for a reunion of The Shield in late 2015 or early 2016.
The motivation behind the talks was long-term planning, where it was pointed out how successful reunions in the past have done, such as D-Generation X.
The idea is to keep Roman Reigns, Dean Ambrose and Seth Rollins apart as far as any kind of unity from now until then, building to an eventual alignment down the line.
(Credit: Wrestling Observer Newsletter)