The new Key x G's x Aniplex project Angel Beats! looks very interesting.
http://www.angelbeats.jp/ More info on the website with bad interpretion below.
The story takes place in the afterlife (at a school of course). The Haruhi-lookalike Yuri leads the SSS (死んだ世界戦線 / Afterlife War?). They wear different uniforms than the rest of the students that have embroidery saying "rebels against the god" which is possibly the best English translation I've seen in a key work so far. The other group members call her Yurippe.
The other girl is called Angel/天使 (The kanji mean tenshi: angel). She is an angel in the form on a school girl and naturally on the student council. She upholds the order of the afterlife and fights violently with the SSS. Shows no emotion.
The theme is life. How it is not eternal and should be valued. This is inline with much of Key's prior work. It will be interesting to see this idea expressed from the afterlife not the human world. What I really want to know is how Maeda plans to kill off characters when their already dead.
Oh yeah, its an anime. Took them two months to announce that.