Kawase Kohei, the producer of Warner Entertainment Japan, revealed on a web radio program that there will be an announcement at the end of the final episode of Little Busters!
. He said, "We know it's impossible to cover the whole story with the current pace. We have promised to animate the entire scenario of the game. I cannot make it clear here but you know what I mean, right? If you watch the 26th episode, there will be a message that you want. Please don't be suspicious. The arcs of your favorite characters will surely be animated. We know 26 episodes is too short."
Source: Norainu Kyodai no Gyokai Jiji Hodan! on Ustream