From Pokebeach:
As expected, early scans of CoroCoro magazine’s May 15th issue have surfaced on Japanese image boards and have fully revealed the three starter Pokemon of Pokemon Black and White. We will be editing this story constantly and adding in information so be sure to keep checking back! Click the thumbnail below for a larger image. There is a chance the scan below is an elaborate fake, so we’ll keep you posted. Thanks go to my college friend DorianBlack for the translations below.

The region’s name is apparently “Isshu” and is located very far away.
The main characters are older than before and are not children.
From a separate source, the Pokemon’s names might be Tsutaaja (Grass), Pokabu (Fire), and Mijumaru (Water). “Tsuta” means “ivy.” “Bu” relates to “pig.” “Mijuku” means “immature” and “maru” means round / ball. Again, these are not the confirmed names yet.

The article and Pics on Pokebeach.