Unreleased prototypes for GIJoe in the 80s appeared to use Transformers, including Ravage and a significant portion of the Omega Supreme toy...
So not only were the two franchises crossing over in the comic and cartoon, but on occasions Hasbro have been testing the concept in the toy realm. Snowcat and the upcoming SDCC exclusives are inspired creations that have made it to production... but imagine if those ideas from the 80s were produced. Who here would buy them?