Seems a bit biased as far as IC goes claiming its not self-contained. I've never read Crisis on Infinite Earths and yet I knew instantly who those people were (well, other than Alexander and Lois--my girlfriend explained who those were). As far as everything else--I imagine a lot of it will be explained going in, but if I recall correctly, they showed WW KILLING Maxwell Lord. Anyone can guess that that wouldn't go over too well with Supes and Bats, no matter what the circumstances. Even without having read the four lead-ins last issues, I got what was going on rather well--so did my g/f, who has read the lead-in minis more sparsely than I have.
As far as Bats dying...HA! No matter how important this book is, its not going to be able to kill Bats and make him Spectre. That'll go to someone else, who will have to deal with all the stupid shite Spec did in DoV. Bats doesn't even BELIEVE in magic. Can you imagine what would happen when all these magic-based beings showed up to kick Spec's arse for what he did, and Bruce-Spectre just goes..."I don't believe in you." ?
I'm pretty sure the goal here is...hm. Thinking on it, he MIGHT be Spectre in 52*. But the Bat-offices gave no sign of this rumor ever really being true in the summer, so who knows. However, 52* would be the perfect place for him to do his "atoning" before handing the mantle over to someone else while he goes back to being Bats in his normal comic.
Oh, and House of M? It really REEKS of two things:
A.) Them fixing (or screwing up worse) what Bendis did in Avengers: D.
B.) Them doing a crossover just because DC is. Sort of like how they did that Identity Disc while DC was doing Identity Crisis. Thing is, IC had been planned to have huge ramifications and what not--ID had not. In the end, only Marvel zombies really cared about it. (Of course, I suppose the same thing can be said for Infinite Crisis, so...) Really though, after what Bendis did in Avengers: D, I'm mostly uninterested in Marvel books. I read Supreme Power, and Iron Man mainly. Occasionally, I'll read Captain America, but I won't touch New Avengers till he quits.