Haven't seen this mentioned elsewhere, but the
Shakugan no Shana ~Eternal Song~ manga recently started in the bimonthly magazine Dengeki Black Maoh, with an official free preview (just a couple of pages)
here. The art looks really awesome, and there's some well-drawn fighting in the full chapters from the magazine. It's set in the time of Alastor's previous vessel (during the "great war"?), so we get to see Wilhemina and the other flame hazes and tomogarana in their "previous forms." Since it's unlicensed and obviously untranslated, hopefully some group will pick it up for scanlation.