I wouldn't care for a TTV8. I'd rather have an NA V8, making close to the same power/torque as the TTV6. That could also keep the prices relatively low, and close to the current MSRP. I think Ford will do it - like a mid-gen refresh, maybe in a year or two.
I'm sure most of the 'crybaby' V8 Gen1-ers will go out and buy a new V8 Raptor. What I'm worried about is, what will you ***** pump cry-babies do when your $70k-80k trucks drop in value to $30k in 2 years, because no one wants a V6 anymore. Hell, that would be the ONLY reason Ford wouldn't put a V8 in this truck. So as not to **** off a bunch of Eco-fool owners.