There is not enough back story to this. All we know is that they have attacked people because Heyman employed them, but that gives us more questions than answers. Are they actually his employees, or do they just do him favours? How did Heyman find them? Why are they attacking people now if Paul is clearly caught up in another feud that Shield aren't in? They need to build these guys as the outlaws they clearly are, and not just have it as the typical "bad group doing bad things because they're bad" ideology that insults many of the fans. I feel like if this were TNA we would at least have more talking segments with Shield so they can explain it, and more selling from the company. Now Shield are seemingly feuding with Big Show and stuff, but why? Why would they concern themselves with that? It will be just another random midcard feud to fill a Wrestlemania spot, when it can be so so much more.