#2 Easily replaceable in The Shield
Time for some honesty again.
While Roman Reigns, Seth Rollins and Dean Ambrose will forever be the original Shield that made their way through the crowd on that fateful night at Survivor Series, it's not like WWE can't just recreate the group. In fact, with the company's history of reworking factions to replace members that leave or are injured, it pretty much seems like a given.
Furthermore, it's not like WWE would be replacing Roman Reigns, who was the group's big man or Rollins, the architect, they would arguably be replacing the least impactful member of the group. Now that's probably not what everyone wants to hear, especially with how many Ambrose fans there are out there, but out of the three he stands as the most replacable.
In the end, whether WWE chooses to ultimately replace Ambrose or not remains to be seen and will depend on how interested they are in reuniting the group in the first place. With that being said however, it shouldn't be that hard to accomplish and there is a long list of superstars that would be perfect for the job.
A WWE Hall of Famer called out AEW fans HERE