Yeah, XIII already and the body is still warm on XII. Not only has XIII been announced but Squenix is so damn sure we're going to love it that they have already announced two sequels for it. You can gain more information by exploring the forum though.

As for XII, it is a very good game but it's very different than previous games in the series. So please come into the game with an open mind and you won't be really disappointed. Ivalice is truly one of the greatest worlds ever created in a videogame.