Gah I wasn't expecting legendaries today!!! But I sure am happy we got them!
so here is what I think-
Reshiram- Like this one, I have this feeling that wind will play a role in its legend. its tail just gives me this feeling of a turbine like thing. (but so does Zekrom's) Pyschic/flying, Maybe our first PURE flying type? Or we could maybe have a ice typing in there somewhere.
I am sure someone will say that it is an light type. PLEASE NO!
zekrom-Looks amazing, fav. legendary pokemon so far except Lugia, always number one in my books. Def. feeling a dark tone with this one, and when looking at the body you can tell it is pretty smooth as if made of stone. (or steel?)
So with that in thought I believe it will either be dark/rock, dark/steel, dark/flying. However I think the first two are new type combinations so I'd be happy with those.
These legendaries look great, and in my opinion I think way better than dialga and palkia. While those were cool, they took a while to grow on me, but I love these new ones.