According to Dengeki Bunko's July issue, third series of anime produced by J.C.Staff, Shakugan no Shana, is to be made, though exact date has not been revealed yet.
Those who read Shakugan no Shana light novels, and also some others, know that anime didn't really stick to the original and the second season plunged into some low-grade, "dramatic", love triangle "comedy". Even so, there are many fans who have not forsaken Shakugan no Shana anime version, including me, and hope to see some interesting development and more Flame Haze x Bal Masque battles in a continuation. And I'd like to see the relationship of Shana and Yuuji to progress too.
Having said this, it's not 100% sure that the new announced project really will be a new season, because there emerge some rumors suggesting that it will be just a remake. However, I think it's just that people are more sceptic after all the commotion about Haruhi, and the third season is likely to be made.
At any rate, fans of Flame-Haired Red-Eyed Hunter have something to look forward to now.
News via Sankaku.