^ Hopefully, it will be called 'SS Chevelle' and will feature a 6MT not the Failmatic...
-> ...and while they're at it, how about 'SS El Camino'.
All of this depends on a few things:
1) How well the SS sells in the first place. I'm guessing the 3000 or so units they want to move will go fairly quickly, and at least in the early runs, my guess will be that demand may exceed supply
2) The "Chevelle" name
might get put on an SS Coupe, as current plans suggest having the Camaro go significantly downmarket in terms of size and performance. It'd leave the market wide open for a big, rear-drive car. It makes a lot of sense of the Camaro is getting to be significantly smaller.
3) While everyone's rooting for the El Camino to happen not just at GM, but also on the Internet, and in the press... The reality is that, unless they can make a case of selling 3-5,000 a year, it doesn't make sense to offer it alongside the new Colorado. But, things could change.
GM has a lot on it's plate in terms of what it is going to do in a post-Zeta world. The Alpha chassis is competitive in terms of weight and performance, and it is adaptable to a wide variety of sizes (see the new CTS). Apparently they're also working on a larger platform called Omega that would be rear or all-wheel-drive, and would serve to create a top-tier offering for Cadillac, and possibly Buick or Chevrolet. But we're still years away from that happening, I'm afraid.
Much of all of this depends on how well the CTS does, how well the SS does, and clearing the plate on other development projects. It seems that they are increasingly focused on new turbocharging applications, and after announcing plans to co-develop transmissions with Ford once again, cog counts are expected to be as high as 10 in new vehicles. All of it could happen... It's more or less a matter if the business case can be made, and someone pulls the trigger.