I saw a few days ago that your starter, or any Pokemon you please, will follow you in HG/SS. You know what that's like? Pokemon Yellow. Where was Pokemon Yellow? Kanto. Is Kanto in HG/SS? Absolutely.
I no longer claim that Yellow will be part of the HG/SS storyline, but it is obvious that Kanto will be remade to be more like Generation III's Kanto.
My proof? The Pokemon following you, the lack of any screenshots of Kanto being released (Meaning that they're keeping something under the wraps.), also, the inclusion of Mewtwo also intrigues me. Also, it is a remake. Was the 2005 Peter Jackson completely faithful to the 1930s original? No, it was enchanced using CGI and modern-day film making techniques. So assuming that the Kanto from G/S/C will be in HG/SS without any enchancements; would be like saying that the little stop action stuffed monkey from the original King Kong will be in the new version. It would just not acceptable. The Kanto from Generation II was created the way it was because of technological limitations, as was the 1930s 'Kong.
Any thoughts or disagreements?
Also, this is my 100th Post.
EDIT: Okay, maybe Cinnabar Island will stay the same.