Sounds quite reasonable to have a new product line to fight against D800
1D X - super high fps (12-14), high ISO performance, 18M, 61 points AF, 6-7K, vs D4, available in Mar
3D X - low fps (4-5), low ISO performance, 36M+, no AA filter, 1D's 45 points AF, 3-4K, vs D800, perhaps with 4K video), announcement in Sep (photokina)
5D X - mid fps (5-8), high ISO performance, 22M, 7D's 19 points AF, 2-3K, entry level FF/video cam, announcement in end of Feb