Not sure if this is 40k, Fantasy, LOTR or something new, so i'll post it here

I just picked up my survival guide to games day uk from my local GW and in there it says an area of the design studio is set aside this year to "project X"

They won't say what it is for obvious reasons, but anyone heard any rumours about what this might be? It seems to be something major, seeing as according to the map, nearly a quarter of the design studio area is given over to it