So Hitsugaya ain't one to sit on his ass when there are things to be done, information to be discovered. And why not go to a place that sounds like it might be able to accommodate his powers very well if things come to a fight? That means Blackbanner Port. He's not fool enough to just run off by himself -- shinigami captain or no, there are so many unknowns here -- so who wants to come with?

(Also toying with the idea of it being his mirror self that does this, but we'll see.)