It's Truck Megatron, Shockwave, and Leadfoot. They are adorable. Not shown but also confirmed from him are Dino and Mercedeswave. https://www.facebook.com/photo.php?....214159005276088.65637.214146041944051&type=1 HeroicC300, parroting his stuff because I can.
These three at least saw release, just not under the DOTM banner. The Megs just ended up being a retool of the Optimus Prime mold though, but Be Cool did have a Red Mirage... Probably unrelated. The real notable one is Soundwave, as even his more G1-ish Bot Shot remains unreleased.
While I'm not sure how Soundwave would've worked, he said Mirage is a chibi-Ferrari. So I'm assuming that the back of the Ferrari sticks up for support, and the curved front gives it a shit-eating grin.
Interesting that the Botshots Shockwave is more Movie like design - the final toy has an Earth Mode for him (One I'd still quite like to see as a Classics/Generations Voyager class toy).
I wish all his concept designs for the ROTF game got toys; that's about two or three waves of product! Plus, his Ironhide and Optimus cab concepts are so dead-on it's astounding.