According to GIGAZINE, a new original robot anime project "Kihei Senki Legacies" was announced at Tokyo International Anime Fair 2010. It's assumed to be a 52-episode TV series.

Key illustration of Kihei Senki Legacies

Staff
Original Story: Kibayashi Shin
Mecha Design: Okawara Kunio
Character Design: Nakayama Daisuke (the mecha designer of "Vexille - 2077 Nihon Sakoku")
Production Studio: TRICK BLOCK (CGI works of "Eve no Jikan")

Synopsis: The story takes place in Kisshou City, one of a few remaining oasis surrounded by lifeless land devastated by a long world war. Wreckages of humanoid weapons, called "Legacies", are collected and reassembled by the residents of the city. One day, a gang of bandits approaches the city to seize the secrets hidden in the Legacies. The mayor decides to intercept them with a special robot Ω99, which has remained intact since the war. A teenage boy Yamato is called up for the pilot. He is just an ordinary gamer, who doesn't even know about the crisis of the city.

Source: GIGAZINE