Announced by BoS (Best of Show) for Fall 2017 release When it eventually becomes available, here's where you'll find it. https://www.american-excellence.com/?p=list&manufacturer=bos-models
Probably not Chevy or Pontiac. The wagons they produce all seem to be Buick and Olds. They already have a 1/18 scale 74 Buick Estate wagon available in 1/18 scale.