I think all we will see is the body and aero bits of the Z06 package along with the much wider wheels and tires but a standard LT1 with the new manifolds as the only change.
This would be an identical recipe the C6 Grand Sport and it will fill a gap for those who want better handling and Z06 looks but are fine with the 460HP. See the pics below.
In order
1. C6 Grand Sport
2. C6 Z51
3. C7 Z51
4. C7 Z06