That's actually a pretty good idea, and very likely, considering we even got one for Animal Crossing. Considering how huge Pokemon is, I wouldn't be surprised at all if they made an exception like they did with AC (all other Miiverses are for Wii U games).
Socran's Razor: "Never attribute to massive stupidity by someone else, what could be explained by a tiny bit of stupidity on your own part."
There will more than likely be a pre-launch Nintendo Direct, and it wouldn't surprise me if one is announced then. Especially since they wanted Miiverse on 3DS by the end of the year anyway, and we're getting pretty close to that.