I'm sure if you visit other Pokemon fansites you've seen this picture:
I saw it a few days ago, but dismissed it as a fan creation. I now know that that theory is wrong! From left to right, the character's are Satoshi (Ash) and his Pikachu, a new character which is replacing Hikari (Dawn), her name is Iris, an unknown Pokemon (the one on the ground) and another named Koromori (thanks to serebii.net for the name), you see Musashi, Nyasu, and Kojiro (Jessie, Meowth, and James), Mijumaru (the Water starter), Tsutaja (the Grass Starter), Pokabu (the Fire Starter), what seem to be evolutions of Mijumaru and Tsutaja, an unknown man, and an Umbreon. We still don't know too much about this, but all of the Pokemon fan-site/news-site owners, including I, will post about it as soon as we find out more. This video also shows a person who isn't included in this, though we don't know much about this character.
I'll post more news as it becomes available, thanks!