Well, I've been thinking about how much Garp desired his grandson to be a Marine; It's not farfetchted to think that his son Dragon at some point was marine too. So, how remote do you think the chance is that the members of sword are somehow conected to the revolutionaries? I think, that if Dragon was a Marine he might had inspired comrades like Aokiji or Fujitora whose justice ideals resemble closer to the people than to the Tenryubito estabished power. Idk if I'm right or not but does it any makes sense to you?