Ahh, you forgot to use the rhetorical tags. :P
I'm under the impression that they have nothing serious planned for this game. I think the date around October has been set because an adventure game CAN be done in that time frame (all LucasArts adventures from the days of Secret of Monkey Island were made in under a year).
The original $300,000 (+ $100,000 for the documentary) was supposed to pay 3 people for 6 months. So, I'm sure they must have ideas of things they want to do, but I believe there is nothing written in stone. Otherwise they could have made the video selling an actual game idea as well, which is what everyone else does