I think Hasbro's just crammed with less than free-thinkers. They are only looking towards the classic trilogy push in the fall, and not focusing TOO much on prequals...
Hasbro's not commonly known for doing the obvious...
I do think they'll (hope perhaps is better than "think" on this one) use the SA body and just make new heads for variations of the figures.
E3-Clones...
Clone variants (colors for rank, or theater of operation from E3)
Clone Pilots (just make a new head again
etc...
Sounds like a logical plan to me, as you'd be cutting down your cost of mold tooling greatly. The thing would barely have cost anything over the long-term use of the molds actually. Can't argue much with that logic, but Hasbro somehow finds a way around that and increasing their costs.
Case in point, ALLLLLLL the other clones they made that are royal crap, up until the SA clone. The 3-pack Clones, the Red Clone and his re-used body for variants, the Clone Pilot, the Biker Clone...
Why? Save some $, do one mold, with possible head variants, and then just pump it out till you break the damn thing and if need be, remold it! Less cost than all the molds to make all the other figures previously.
Again, Hasbro tends not to think so "obviously".