dude, I highly doubt it's going to be Kingsley....think about it, think about everything that happened to Harry so far, plus the fact him saying he'll kill spider-man and all the ultimates... Harry will probably find the Oz serum and use it for revenge on Peter
I mean it would be pretty easy for Harry to get back at Spidey since Harry knows that spider-man is Harry.
Although it could be that Kingsley is the Hobgoblin and he found a way to get at Normans serum, but Peter thinks its Harry because hes back at New York again.
Or hey it could be Flash Thompson or even Maryjane (not really) but its anyones guess, but one thing is certain that this is shaping up to an exciting couple of issues.
I agree with Spider-Venom, it probably will be Osborn (or a red-herring Osborn).
I still think it's gotta be Kingsley (but then again, we haven't had the big-build up of his character.) and if Bendis can say CARNAGE KILLED GWEN NOT GOBBY, then he can say Spider-Man is Bruce Wayne.
Although the next few issues are gunna rock, I still think Kingsley as hobby would rule.
If they don't make Harry as the HG, they can do lots of other stuff with him. Such as his issue with drugs, or his transformation into the 2nd GG...