I wonder how many years it will be before NA gets this one

...you mean the same one that was revealed four months ago with the other two that haven't been "revealed" yet?

This is the reveal of the event that will presumably bring it to the 99.999...etc% of the population that can't hack a 3DS game.

1/4, if the delay for the XY anime dub is any indication.

Concerning distribution - Think there will be mystery gift? Or maybe an in-game event downloaded through the eShop? Free for the first few days like Four Swords Adventure? DLC?

I'm not talking about obtaining one. I know how hard it is. I'm talking about knowing what it is. It was pretty big news when they were first hacked. I bet you'd be hard pressed to find a Pokemon fan that generally browses the internet that didn't know about them.

This is the official reveal, at least in Japan. I think there are two others that were found via hacking but haven't been introduced yet.

Like other event Pokemon I would probably expect it to be distributed around the time the movie is released in Japan, then again here in the US when they dub it over.

Does Diancie rhyme with Beyonce?