Where's Thor???
And why are both of Marvels oldest characters not playing a more prominent role in this Dark Reign mularkey?
I wouldn't bring Thor into Dark Reign until his raw power was needed. It would have to be at the big blow off where Osborne is losing everything and he is basically starting the second Civil War unleashing his teams on all of the heros. In one of the final battles Sentry or Ares is about to deal a death blow to an important figure (Ironman, Mr. Fantastic or Ms. Marvel) Then a hammer come out of no where (BAM!!!) Full page of Thor surrounded by lightening and ready for revenge. The tide truns. That's how I would bring him back in. But that can also work for the return of Captain America too.