If I threw out a totally wild guess, it would be that the Z06 will make an appearance for 2015. I heard rumors of a Z06 test mule being flogged in Arizona but have zero evidence to back any of this up. As for a ZR1? I hope they bring it out but will I only believe they are making it after an announcement is made. My guess is that they spent 90% of their efforts developing the C7 as we've seen it and now that they are down to the final details before production starts, efforts can be focused on developing the Z06 by cutting down weight, increasing the stiffness and (I Hope!) a 427 made from the LT1! If the Z06 proves successful, then maybe a ZR1 would be next but from my understanding, the ZR1 wasn't exactly flying out of the dealerships which may make GM reconsider the cost in developing a new one (how I hope I am wrong about that!!!! I want to see a C7 ZR1!!!). Everything I've written is absolute speculation with zero evidence.