Update: Wow. This one is clever. The Easter Egg here is actually more of a game of sorts. Once you press and hold the "N" logo in the Easter Egg screen to reveal the cat emoji, pull down your notification quick settings, tap "edit" and then move the "easter egg" option up to the settings. It turns into an "empty dish" that you can tap to add things to ... and you lure a cat to your notification shade! We're diving into this one now. Double touché, Google.
Original story: Nope. Nothing at all when you tap the "N" graphic in the latest Android 7.0 Developer Preview. Just a cat emoji and a no entry sign. Looks like we'll have to wait for the final Nougat release.