Well, it was a running joke during his Ustream that our next stretch goal would be cats. Now my reason for wanting it is because of a few other games, BG + IWD. You'll recall the dead cats in IWD and the pantaloons in BG, i'm thinking something fun a long those lines would actually be a cool stretch goal for the game itself.
Now that you mention it that would be cool....though maybe not dead this time. Still I think they ought to be a stretch goal's bonus point rather than its main incentive.
There was a lot of cats in NWN2, I'd be surprised if there were none here - even without 4M stretch goals.