Going off the hatch drawing for a second...
I think now that "Henry" has gotten an explanation of the hatch and what they do in it (from Locke), he may have re-thought his position on the Lost crew. He may realize they're not out to harm, not pressing the button for some sadistic reason (that they know of). I dunno, just a random guess. Maybe he'll figure out a way to get what he's learned to the rest of the Others.
Of course.. then the show would lost a major plot point
I haven't seen any info on the future Lost (no 'coming next week' or spoilers), so this may be disproved at some point.