Fisker wouldn't be there not that type of show I've gone in the past couldn't make it this year. When the Karma came out one company that was there with a custom body kit on a Karma they were the offical company Fisker was going to use to produce body kits if not mistaken cost was around 12K
Was at SEMA last week for work and saw most all of the cars, inside and outside the Convention Center. I don't think I remember seeing one Fisker. Which makes sense, given that it isn't 'new', now.
Actual automaker presence is spotty. Big displays from Chevrolet, Ford, Chrysler/Dodge/Jeep, smaller ones from Honda and Kia come to mind. But because it's an aftermarket event, the only reason OEM's show up is to showcase their new cars, usually customized by tuners. So given that, there's absolutely no chance that FA would be there.