Yep it's Hachchin (spl?) alright ^ ^ ... because they do mention 'Octopus' in the chapter, and it'll be a HUGE anti-coincidence if it's not Hachchin.
Man In The Iron Mask - hmmmmm ... it's going to be VERY interesting what Oda pulls off here because it doesn't make sense if that's someone from East Blue. I mean, Luffy took all this time to get here and be this powerful. If this guy's either Morgan or Arlong, it'll be impossible to have that sort of power in such little time, ya know! AND, be this fearful in the Grand Line?!?! It MAY be someone from the recent arcs ... and it's not clear if Luffy ruined his life, or Zoro or Sanji or Franky ... come to think of it, it may be that guy from Enies Lobby ... what's his name ... Spandam maybe? Overhaul from the good ol Vegapunk, you think? The chap says "ruined my life" ... now, Morgan was stripped off his title and what not so it makes sense if it's him, then it could also be Don Kreig! If it's Don, it'll be interesting for that side kick of his to come in the story and battle Sanji again, they parted on a good competitive note, aye. There're a lot of possibilities ne ... Luffy screwed up the Don's life fer sure, but Don should be after Hawkeye too then X'D, but, honestly, it's a little disappointing, I just wish they got to Mermaid Island already. Oda better explain himself. This mask guy says Straw Hats ... hmmm ... it may not be Morgan then, cos he never knew Luffy as part of the Strawhat crew, just as Luffy. I re-read the initial manga chapters all morning, took 3-4 hours X'D ... it can't be Buggy all beaten up like that and in armor? ... Crocodile is still in Impel Down, maybe it's Wapol? That would SUCK. Can't be anyone from Skypiea, can't be Bellamy cos that'd be disappointing again ... he ain't that fierce. Can't be Kuro cos he's all skinny and NOT THAT POWERFUL, Enel's busy riding the clouds or off to Mars/ Mercury/ Moon, Arlong had a huge nose now didn't he, it could be him? But, he's always been passionate about his own men, so why capture Hachchin? Can't be him either. Do we even know this guy? Maybe he was never introduced? This guy has a scarf thingie, the Don had a scarf thingie too right? *can't remember*. I'll stop now before my head explodes. Wait, can't be CP9, all of em died. EDIT: I just hope that when we do find out who he is, it should be a "WTF" moment, but in a good way, and not "WTbloodyF >_<", ya know.