The Johto Region: REVEALED and HUGE! (Kanto not shown yet...)

[Naraku_Diabolos]

Here are some screenshots on Serebii's website that are much clearer shots from the CoroCoro and from the Japanese Pokemon website:

http://www.serebii.net/heartgoldsoulsilver/pics.shtml

EDIT: Also note on the map I posted has fog covering up some areas; those are hidden areas and they will not be revealed until the release date of this games comes closer to September.