Seeker time!
As it turns out, the chases are indeed Thundercracker and Skywarp. I was lucky enough to nab a Thundercracker in my 3 pack I got in store this morning at Rotofugi. I also snagged some photos of the Starscream version with some of his more Transformers brethren.
Hey, the guy to your right is 3rd party too!
Old to new to hyper new.
Gerwalk this way!