Yeah, you're probably right, it could be a 4D, but the low ISO range of 100 to 12,800 and not 50 to 51,200 or 101,400 threw me. Is this going to be a $4,999 EOS 4D designed for Studio or outdoor Landscape photography where low-light is not an issue?
Yeah, I mean, of the professions that need low-light, how many of them need 46mp? Wedding photogs and PJ types don't. Most sports guys wouldn't, and if they did, 5fps wouldn't be fast enough anyway (I think they'd take 12fps at 18MP).
I guess the use case would be astrophotographers who want to be able to shoot at 12,800 and print big. But that is such a small niche within the larger group of landscapers that I think they'd focus on low-ISO levels. Heck, most landscapers would probably take extra DR right now over the ability to use 25,600.
They did the same thing with the 1Dmk3 and 1DsMk3 I believe
edit: Yeah, the 1D3 was announced in Feb at 10MP with ISO 100-3200 and 10fps, the 1Ds3 came out in Aug at 21mp with ISO 100-1600 and 5fps.