Man, Weaver would be awesome as the Red Skull. It's something how an actor can be so great in a particular role, like James Earl Jones in some sort of majestic role. Weaver is just awesome as a bad guy (Agent Smith, Megatron).
But I got to ask, are you guys more excited about the Cap film, Thor, or Green Latern? I'm leaning more towards GL right now. It's leading the way because it's being filmed here. It's lead could change though.