I wish they'd sell a Cadillac version (or at least a decent trim level) -- the seats are horrible. I'd happily pay $5k more for $2k of better seats. (Aftermarket upgrades are a pain.)
The ELR, Cadillac's sort of coupe-sister to the Volt took about two years after the Gen 1 Volt to show up in the market. Maybe a similar timeline plays out for a Bolt sister in the Caillac line? Though with GM talking about going mostly electric by 2023, maybe it will be a shorter wait than that.