I like the theory of a plane flying you to white forest/black city. Although the White forest/black city may be somewhere on the map but is covered up by clouds.
As other people have been saying, get the English version. Of course you have to wait a couple more months, but in the end it will be worth it being able to understand everything. I'm getting black and white in English.
RE: Where do you think the gyms will be and what gym types will there be?
I think there will be a normal, grass, steel, electric, bug, ice, ground, and dark type gyms. Where they are, I don't know.
Ok, so you people know, this is a KIDS GAME! There is no possibly way there will be any sort of war as people have already stated. As much as I like it, it will not happen.
IMO, I think Pokabu will be Pignite, Mijumaru will be Shotter, and I have no clue what Smugleaf's English name will be. But I would laugh pretty hard if it was Smugleaf! ;D
I think Dento is a grass type leader now. I hope not though, because I'm picking Mijumaru for my starter and there is NO possibly way I will hurt that grass monkey (if Dento has it). I won't be able to get past the first gym!
Love monkeys. Love the grass type, too. I hope you can catch him at an early level because he will be on my team for sure! Hopefully, he has AMAZING stats and movepool with decent evo(s)!
RE: battle fronteir/ other post-game activities
Emerald's battle frontier was pretty great now that I think about it. And I love the unlocking new islands thing after you become the champion. The island could be called Champions' Island or something where all the Isshu champions go.