hmm...I still don't see Zeta as being dead. Far from it - they have no 35mpg CAFE to deal with in Oz, and that's where they're using Zeta mostly - so the folks down-under are the remote lifeline of Zeta; it's become a few branches in North America, instead of many...that's all.
But Alpha IS exciting. It's a small-to-midsize RWD platform, that if built, is said will also be sourced from Australia. But suppose the Camaro were to get moved to it next MY - that'd mean a slightly smaller, more nimble and fuel economical Camaro..........