No, that would be a huge step back for all three men. Move forward, not backwards. There'll no doubt be a short-lived reunion between them some four or five years from now, but in order for that reunion to have any impact and feel like a true "homecoming", they need to be apart for a hell of a lot longer than a year. That's barely anytime at all. And reforming the group as heels would never work since the whole concept of the group is too cool to ever boo again, no matter who they triple-powerbombed through a table.
Also, the entire show has more or less centered around Seth Rollins for about the past year and this Sunday he's scheduled to defend the WWE Championship against his former Shield brethren Dean Ambrose. I'd hardly call that "not doing much." Even if I were to, hitting the reset button and reverting back to something that all three guys have already grown out of wouldn't be the answer.
