In case you missed it - Sean Punch confirmed on Friday the big new Dungeon Fantasy product will come in a box:
"• I spent all week on what I spent late January through early August creating. Except that this week was all about planning how to pay for it. The creation? Something GURPS Dungeon Fantasy-related that will come in a box. Paying for it? Stay tuned for a big announcement in the coming week . . ."
This week is that coming week - and so in addition to potentially DF 19 coming out on Thursday - no, I don't know what it is - so it should be public soon.