The first gen Impreza was offered in a coupe. Though that does pre-date the Sunburst by several years and was relatively unique among competitors.
I hope there will be an update tomorrow since there wasn't one last week but now there is hope, it seems that the devs are releasing it on Wednesday now
Actually, a Sunburst coupe wouldn't be entirely impossible - there were a few FWD compact cars that could be had as coupes from 2009-2014 (i.e. Honda Civic, Chevrolet Cobalt, Hyundai Elantra/Kia Forte). We only have one FWD coupe in the game (Wendover), so getting a smaller FWD coupe would be neat. And said coupe could also be made into a convertible quite easily. I still think that a hatchback would be the most logical addition, but I wouldn't mind getting our first official convertible passenger car and another small coupe.