As reported on
ANN and elsewhere, the latest issue of Dengeki Bunko Magazine reveals that a new Shakugan no Shana anime project is in the works. This is most probably what Geneon was
referring to when they mentioned that "that much-loved series" would see a TV continuation this fall. The first Shana anime series aired in Fall 2005, with the sequel in Fall 2007.
Anyway, this thread is for expectations and predictions about this new anime project. Details will be announced in the coming weeks and months.
NOTE: YOU MAY NOT POST NOVEL SPOILERS IN THIS THREAD EVEN BEHIND SPOILER TAGS.
Edit: The new series was later revealed to be the Shakugan no Shana S OVA Series, to be released on BD/DVD beginning in October.