They are going to base it on the Achiga hen manga? DO WANT. In that case they may be able to pull something interesting off. The series is basically about Nodoka's mahjong friends from elementary school making it big in the inter high. It's good, at least judging from the 2 manga chapters released so far. Plus the character designer is the same person who does Bamboo Blade. Good stuff.
I'm guessing now the manga chapters released so far were just for testing waters and see how people received the spin off.