Dark Avengers is full of schisms.  Outside of the obvious (who should we root for?), the book was divided in half.

The first half was a long conversation between the Sentry and Osborne.  Bendis is at his best writing these quiet conversations.

The second half of the book was typical battle fare (with a Deodato mandatory two page pin-up) before it turned into a Bob Layton Iron Man/Doom teamup from the 80s.

Overall:  very good.