Surprised this hasn't come up yet:
"After a 30-year hiatus, the Buick Regal Grand National and its high-performance Regal GNX variant are expected to make a return sometime in the 2016-2017 time frame. Here is some information we’ve gathered about the 2017 Regal Grand National and Regal GNX. This page is a continuous work-in-progress and will be updated on a regular basis as we await any official details from General Motors and Buick."
http://gmauthority.com/blog/gm/buick...rand-national/