Wouldn't surprise me if we have after this arc Shanks/WG alliance to actually kill Luffy, seeing how things are gonna go south btw the Navy and WG for doing shit behing the Navy's backs, Akainu will be the one to be disgraced as he's the outside face. And the balance of powers is being deatroyed with no pirate on their aid and the Yonko being removed.
It's hella sus Shanks of all characters obtaining the gomu gomu df, I wasn't on Evil Shanks theories before, he might not even be necessary evil, but just someone with other agendas we aren't aware yet.