the crossover was announced at comic-con. it's a six issue miniseries or so. more info about it
here. i'm not that hyped about it, but it might be cool. all the recent idw turtle stuff's been good.
joseph gordon-levitt's working on the sandman movie. i can't remember if he's directing it or just writing the script, or what he's actually doing with it. there was an article maybe a few weeks back about how he's having trouble with it (or something like that). i haven't started to read any dc sandman stuff yet, so i don't have any idea about what the sophistication would be.
seth rogen's working on preacher. he seems to one to want to stay faithful to the source as much as possible. there's a bunch of articles out there about it, even some pictures released. it's supposed to air on amc. i think it seems promising.
i don't know anything about the lucifer tv series other than it's supposed to air on fox