Are we sure this is a Shanks Dopleganger/Clone/Twin Brother and not just Shanks? I guess most depends on the dialogues of the scene,but so far,we only have the spoilers. The spoilers providers are hinting this isnt Shanks,but who tells us that they're right? Or maybe its Oda himself that wants us readers to think that,for now..to then reveal it was Shanks all along.