Smarter pigs? What's next? Pigmen NPC's making villages? And then what? Zombie Pigmen? Is this world changing into a pigman's land? Are Pigmen going to drop dollars? Will they have pet sheep, which bah when something comes nearby, like a loyal dog? Will squid learn to walk on land, become 3 blocks tall, and move blocks around, to make cities themselves? Maybe, they might even smart small, by just moving blocks around randomly, and eventually, on a future update, they will learn how to build! O: We must name them... The farlanders!
I'll just assume you were joking around, but if so, then to everyone else, the "secret project" is from what I've heard, something completely Minecraft unreleated. It's some prototype for a possible future game. Might be he is working on a game for another company or something.