I do think the bandaged guy we've seen is Dent, but he's not Hush. A couple more Hints that Elliot is Hush:
In #609, as Huntress and the Batmobile are racing off, Dent is watching from the rooftops and says "Without friends no one would choose to live. Though he had all other goods." Same Issue is a flashback where Tommy and Bruce are kids playing a war game, and Tommy is whoopin' Bruce because he is able to think far ahead of Bruce.
In #611, Thomas says, "There is something you could do for me, However..." Thomas then tells Bruce he wants to play a game of war, and he wants Bruce to actually show up for a check-up. When Bruce points out that's two things, Thomas reply's, "It is, isn't it?"
In #612, after Batman and Superman get Ivy, they're talking on a roof top. Batman says, "what are...friends for...?" the next panel you see Dent watching them through binoculars,repeating what Batman just said and laughing.
