When IDW took over the Transformers license, they were approached by Holmes as well, loved his idea and he collaborated with Furman to further tie-in the story into the continuity of the IDW-published Transformers comics.
When IDW took over the Transformers license, they received an offer from Holmes, whom they liked, and he collaborated with Furman to enhance the connection between the Transformers story and the IDW-published comic book series' narrative.