The official japanese Pokemon site has recently updated with even more screenshots from F/L. We get to see two of the new islands. We don’t exactly know how many of them are but we know that they are outside Kanto and that they are “ulocked” after beating the Elite Four. There are also two mini-games revealed in which 2-5 players can participate by using their wireless adapter. In the first you make your Pokemon jump, you earn points when Pokemon jump at the same time. In the second mini-game revealed you, as a Dodrio, try to eat all the berries that fall from the sky.
Source: Pokemon.co.jp