According to a post on Siliconera, New Atelier Rorona is on its way in just three months.
Siliconera has this to say regarding the upcoming title (and the first in the Atelier trilogy timeline);
New Atelier Rorona will have plenty of new content according to the leak. The character modeling is said to have gone through a big upgrade, which will better depict the original illustrations.
The game will also feature new events and the time system has also been extended. Gust will also add a Time Capsule, item cultivation, additional trophies, new battle characters, and additional costumes.
New Atelier Rorona has a cross-save feature, allowing you to carry your adventures from the big screen on PS3 to your pocket on Vita or vice-versa. The PlayStation 3’s limited edition copy will come with a crystal paper weight, and a controller sticker, while the Vita’s limited edition will come with a mini-crystal paper weight, and a skin for the console.
Sounds like a complete overhaul! Atelier fans, start saving now 
[source]
After Dark Gaming 