Update: this all being said, I still believe we will see a plastic Thunderhawk. I think this is the Forge World Resin MKIV to the Games Workshop MKV Dreadnought. So many models have started in one iteration and then been ported over to plastic. Maybe the previous Thunderhawk that FW made is now the up and coming Plastic bird.
I still believe in a plastic Thunderhawk. It's just not this one.