Ok, here's the scoop:
Before the movies started there was a brief parody cartoon featuring the main characters from Shana, Kino no Tabi, and Inukami. It featured those characters going to see the Dengeki Bunko movie event. I forget what happened exactly, but it all ended with Shana and the other girl from Inukami getting angry at the two boys. Kino brought her bike into the movie with her.
Spoiler for Shakugan no Shana Movie:
The movie was actually, to me, a great disappointment. I don't know what I was expecting, actually, since it was clearly going to be a recap. Indeed, it felt like the chopped up bits of episodes and strung them together, with Yuuji giving a narrative. It began with a comprehensive summary of the first episode, in which Yuuji discovers that he's dead and Hirai-chan slowly fades away. We see Friagane's doll come into the classroom and wreak havoc, Yuuji gives his remaining power as a Torch to fix it, etc., etc. The Shana-undressing scene is also kept intact. Scenes of Friagane plotting are also pretty much the same. What was slightly different was the treatment of the Interpreter of Condolences. She appears, gets a quick intro, sends out a finding spell and immediately after meets up with Shana and Yuuji. Unlike the anime, there is little animosity between teh two, and they team up against Friagane almost immediately. The final battle with Friagane goes down much as it did in the anime.
But at the end of the battle, there is quite a surprise! In order to consume the large amounts of Guze Flames released by Friagane, Alastor reveals his true form. Looked really cool on the big screen. Of course, there was no mention of how dangerous this was to Shana. After that, there is a scene where Yuuji appears to "die" as his Torch runs out, but of course it was a fake and Shana laughs at him for being sentimental during his "final" moments. End of story.
There is not a whole lot to look forward to here for Shana fans, unfortunately. But the merchandising was sweet! Shana towels for 5000 yen, yikes.
Oh man, but was the Inukami movie hilarious! I had never seen Inukami before, so I couldn't tell much of what was going on, but it was absolutely insane. In it were parodies of Death Note, Haruhi, Nanoha, Ouran and a bunch more. Definitely the best movie out of the three.
Kino no Tabi movie was rather dull, but gorgeous animation.
Oops double post, gomen.