This idea seems like it has incredible potential, and to see it go to waste is quite grieving. Since I do not wish to see such an intriguing idea go to waste I'd like to offer my opinion.
I do believe, Dartz, that this idea could be carried out as you originally stated with the main characters used in a supporting role, however, to fully bring it to the paramount of the concepts potential you would have to make the ACC's incredibly strong characters to stand on their own in a predefined world in the lead positions.
By strong of course I mean that they will have to give that feeling of reality and humanity that requires a subtle but strong understanding of things from the author. You have done some decent work before though, Dartz, so I really believe that you could bring the characters to life.
Also, since it's been a
very long time since I've posted here, forgive me if you already took off with this idea

.
- peace out
Thraylion
P.S. if you've given up on this one, do you mind if I give it a whirl? It really is too much of a good thing to waste.