You know, one thing people forget is just because the 5D exists today, doesn't mean it has to exist tomorrow. Maybe canon could split the 5D features somewhat. Move the best features from the 5D and move them up to a 3D with more functions from the 1Ds. Then create a 6D/65D with less features. I would go the 65D route because then you could justify a plastic body. I would also hope that they would keep the MP down on both this round and focus on light sensitivity. My 7D does well, but a 12-16 MP Full Frame could potentially murder the market for noise free high iso pics. 3D would get the dual Digic setup, 6D/65D would get single.