@pganssle that sounds like you are given a fair degree of flexibility, providing your output conceptually fits the banner of some product. The contract might get weird but above all you can act autonomously which is great
@binsrc There's a good chance that if they don't want to be associated with it they'd either grant me the IP or say I can't release or publicize it.
I suspect they don't really want to exercise any rights like that on random weird fiction, though, so they'd probably either grant me the IP or some unlimited license to it. IANAL and I can't speak for Google, I just know people involved in OS at Google and they aren't really in the business of being petty (they're really very nice).