Ooh....sorry, it's just so hard to believe because...y'know...April Fools...
No need to be rude about it. I've seen some rather elaborate pranks the past couple years, which have included fake game releases.
I mean, stuff like Half Life 3 and new Pokemon games are obviously jokes even though a couple of them were done exceptionally well this year.
I just get suspicious of any game releases announced on April 1st; companies should know better.
In any case, I would have rather seen some DLC for AC:NL (like villager zoning) over something like this.