Post-apocalyptic isn't really that much of a hype object in the sense it has been for the last few Jams. It's just that stuff happened, new forum appeared, there hasn't been a Jam for half a year, old GMC was closed, there are lots of weird changes and mutations in this Jam... the post-apocalyptic mood is kinda natural here. I can't promise that subsequent Jams will or won't have some sort of motif related to them, but there won't be anything of "one of winners picks a random object" sort.
By the way, you people might be interested in yet another letter...
_ _ _ R _ _ _ _ _ _ _ S _ _ _ A _
(soon, the themes will be voted over!)