I think they'll just relocate production offshore to Southeast Asia and import them under a deal in the AANZFTA (that's a mouthful!).
I've been in a number of VZ and VE Commodores over the last six years, great cars. This year I got to drive a number of Utes when I was there, including a VE Maloo R8 -- and fell in love with it.
I was hoping after the recent success of the Chevy-badged police cruiser and the SS that GM would rethink it and start retooling Oshawa for VF production, and maybe expand the line to include the Ute/Maloo.