Back in 2007/08, GM had masterful plans for a 2010 Impala. One that would be using the wonderful Zeta platform. Unfortunately those plans were dropped and now we have a Epsilon II Impala coming 2014. I have no idea why they are taking so long and why they chose that platform, but GM always has it's moments of not making sense.
Anyway, what would the world be like were the Zeta Impala released?