I liked it. Maybe it was more clever than brilliant. But just incorporating so many moving parts was a feat in itself. And there were a lot of little things that were nice. spoilers:end of spoilers
Cordelia telling Dave that his desire to be a Superhero warped reality to bring the others in. Paralleling the onset of the Millarworld. Then Dave explaining why the Magic Circle could be involved. "He calls himself a socerer"The big Avengers 97 spread as everyone comes in. The little cameos at the end, including Gibson's ignominious fate.
I'd say, he pulled off a crossover better than Marvel or DC has in years.